Spins the chain on the bike under load

Why does the chain slip on a bicycle under load? How to fix spinning on a speed bike

The main reason why pedals spin the wheel poorly on a high-speed bike is complete wear of the rear sprocket system. First, it is determined how dirty the system is and its degree of wear. How to clean a cassette:

  • Take off the bike.
  • Clean the space between the stars with a flat brush.
  • Wipe the teeth and washers with a cloth soaked in kerosene.

After thorough cleaning of dirt, check the condition of the bearings. Scattered or knocked out parts must be replaced. The condition of the stars plays an important role. worn out teeth indicate their unsuitability. This is especially true for small sprockets. here chain slip and pedal scrolling are more pronounced.

Normal (left) and ground gear teeth

And finally, check the performance of the system using the speed switch: through which stars the chain slips, they must be replaced. After cleaning and partial replacement, the system is lubricated.

Rear hubs can also fail, the problem is the same as with a single speed bike. The cassette must be removed to access the bushing. The condition and position of the bearings, wear of the cone and roller tappets are carefully checked. If you suspect a bushing, it is recommended to install a new part.

When the pedals just spin, it’s a sure sign of transmission wear. To prevent the problem from turning into more unpleasant consequences, you should diagnose the bike in time and eliminate the malfunction.

Simple solution to the problem

When the pedals begin to turn, then you should not immediately think about repairs, start disassembling all the components and systems. If the pedals are scrolling on a high-speed bike, then it makes sense to first check the correct setting of the front and rear derailleurs, which are responsible for changing the speeds.

When pedaling on a high-speed bike, first of all, you need to adjust the front and rear derailleurs, which are responsible for changing the speeds

On two-wheeled vehicles without a gearshift system, it may also turn out that to solve the problem, it is enough just to thoroughly clean the chain and lubricate it well.

Repair of a regular bike

If the pedals are spinning on the bike, repair is simply necessary

When cleaning and lubricating the chain does not work, it is important to check the condition of the sprockets. It is important to change the sprockets and chain in the kit

Otherwise, the result will be short-lived. The new chain on worn parts will quickly stretch, and the old chain will quickly bend the teeth of the new element.

In some cases, the problem lies in the wear of the bushing itself. It can be repaired by grinding the cone in special workshops. However, this will just slightly extend the life of the part. It is best to replace it immediately with a new product.

We repair a high-speed bike

To determine exactly why spinning happens on a high-speed bike, it is worth determining the degree of wear of the rear sprocket system. To do this, dismantle such a unit, thoroughly clean the space between the elements, wipe the part with kerosene.

To understand the reason for scrolling on a speed bike, you need to determine the degree of wear of the rear sprocket system.

After that, you can start checking the bearings and teeth of the sprockets. Knocked out or loose parts must be replaced. Sharpened or crooked teeth indicate that it is time to replace that part of the assembly. Wear on the smallest elements will give the most pedal creep.

After replacing damaged parts, the entire system should be properly lubricated with suitable compounds.

The cranking problem on a high-speed bike, as well as on a regular bike, can often be associated with a failed rear hub. In this case, it is necessary to remove the cassette, carefully check the condition of the roller pushers, bearings, and the cone itself. It is better to replace the worn-out parts with new ones, and then install the entire system back. After the completed work and the installation of new elements, your iron friend will be as good as new and you will forget about scrolling for a long time.

So we figured out the causes of idle scrolling. We studied options for their elimination

It is very important to systematically clean and lubricate the undercarriage of a two-wheeled vehicle and then many problems with the performance of the bicycle can be avoided.

Reasons for malfunction

The problem happens when the load on the bike’s drivetrain is at its maximum. when going uphill or when changing gears. This happens for several reasons:

  • malfunction of the speed switch or its misuse;
  • wear of the stars on the cassette or pedals;
  • chain stretching;
  • complex wear of the gear shift system.

Let’s take a closer look at the problem of chain slipping on a bicycle.

If the chain slips on the bike at speeds, the first step is to make sure the gear derailleur is adjusted correctly.

The bike is turned over and placed on the saddle, then you should spin the pedals with your hands and switch the speeds. Advice! It is required to pay attention to how the chain jumps between the stars, whether it falls into the gaps between them. If the problem occurs on a single speed, the problem should be looked for in the wear of parts. Most often, the entire transmission wears out at once. in cases where its elements were not replaced individually. The wear rate increases if the parts are contaminated with abrasive materials such as sand

You can determine why the chain slips on a bicycle under load by assessing the state of the chain. The wear rate is based on the increase in its length. Initially, it varies depending on the bike type and number of links, but the procedure for determining wear is the same, since the length of one link is always 12.7 mm, or 1/2 inch. You can measure a separate area with a ruler. 20 links are enough. In good condition, its length should be 2012.7 = 254 mm. If it is 3-4 mm larger, then the degree of wear is serious enough to require replacement.

The stretching of the links leads to accelerated wear of the small stars, which makes the speeds begin to shift worse, especially when moving from large to small stars. And over time, the cassette may fail altogether, because of which it will have to be removed and replaced. You can assess the degree of wear of the sprocket teeth by eye by comparing the part used with a new one having a similar diameter.

Many people do not consider their gear shifting technique when thinking about why the chain slips on a speed bike. misuse of the derailleur can also cause the transmission to wear quickly. You need to know a few rules:

  • The numbering of stars at the pedals goes from lower to higher, in the cassette. vice versa.
  • It is necessary to include a smaller gear at the front and a larger one at the rear and vice versa, that is, combine stars of different sizes in order to avoid skewing.
  • For each chainring there are several rear.

If the cranks of the bicycle sprocket are worn out

In general, problems with an asterisk can be detected with the naked eye without proper experience.

First of all, you need to pay attention to the force with which you have to press on the pedals while driving. if you need to make significant efforts, then the problem is in the sprocket. And this leads not only to scrolling the pedals, but also to stretching the chain, and then there is only one way out. to completely replace the bicycle chain with a new one

There are 2 more options:

  • The sprocket is simply “worn out” (licked off). this happens when the bike is used for a long time and in the absence of proper care of the vehicle. With this problem, poor grip is observed, which provokes pedaling.
  • The sprocket is too dirty. you will have to thoroughly clean it with special liquids or fine-grained sandpaper.

If there is a problem with a worn out asterisk, then you need to do the following:

  • remove the rear sprocket;
  • disassemble the asterisk;
  • if necessary, replace parts with new ones or sharpen the sprocket teeth.

Please note: Experienced cyclists recommend a complete replacement of the drive mechanism and have it done in a specialized workshop.

What to do to avoid pedaling?

The most common cause of spinning on a bike is a chain malfunction

Therefore, you should give her close attention and care to avoid possible problems. After each long ride (especially after driving in bad weather), thoroughly rinse the chain to remove dirt and excess lubricant

Chain and Pedal Lubrication

Avoid greases that are too thick or old.

As you can see, many problems with a bicycle, including pedaling, can be solved simply: often washing and lubricating the part is enough. But even if the reason lies in something more, the problem of scrolling is solved quite simply and everyone can do it. Do not forget to regularly wash and lubricate the “iron horse”, as well as regularly carry out maintenance, and your bike will delight you for a long time.

Loose chain tension on bicycles without gears

The rear fork of a conventional bicycle, without shifting speeds, under the influence of loads and vibration, changes position relative to the axis of the rear hub. Chain drive slack increases. A slight push releases the chain from the sprocket teeth. The chain slips off. To fix the problem, you need to follow the steps in sequence:

  • Flip the bike.
  • Loosen tensioning bolts.
  • Set the wheel to the required depth.
  • Tighten the bolts firmly in the new location.

Chain slack

You will enjoy cycling and the chain will no longer fly off if you set the wheel properly. Correct position implies:

  • lowering of the chain by about 5 mm. the “in line” state makes it difficult to pedal;
  • the axle of the rear wheel hub must be perpendicular to the plane of the frame. Otherwise, the risk of deformation of the rim increases;

To improve the grip of the nuts, use spring washers.

If critical slack is not eliminated in the extreme position of the sprocket, you need to rivet the links to reduce the length of the chain.

Decision

After finding the answer to the question about the cause of the chain malfunction when the bike is loaded, it is worth subjecting the technician to repair. Such an event can be carried out independently, because the main reasons for parts wear and breakdown are known. In this case, all actions should be carried out very carefully, and the old elements must be replaced with new ones with suitable dimensions. Such a careful approach allows you to quickly and efficiently change the necessary parts of the system and ensure the bike’s performance under optimal load.

With large stretching of the links, the probability of damage to small and medium stars is quite high. Therefore, a thorough examination of these elements is important and allows you to determine the next steps. If the sprockets are worn, the sprockets of the required size should be selected and the cassette renewed. An alternative option for replacing parts is to install a special “damper”, which maximizes the life of damaged elements. Such a device is often used in cycling and prevents the chain from flying off the stars.

One of the most common causes of circuit problems is inaccurate switch settings. In this case, the bike chain slips under load. In this case, it is necessary to adjust the switches, and for this you need to set a suitable tension for all cables, adjust the travel in the lowest gears and optimize the travel in large stars. In this case, you should take into account the features and characteristics of technology.

Any type of cycling will always have a significant impact on its drivetrain. Why is a chain slipping on a bicycle and how to fix the problem? Chain and stars will wear off or deform over time.

To prolong their life, regular maintenance is recommended in the form of cleaning from dirt and dust and greasing. But even if all the rules for maintaining the transmission are followed, its parts will still wear out over time. Then their replacement is required.

The reasons

There are a number of reasons why the chain fails. They are listed below:

  • weak tension (applies to both bicycles without gears and with variable transmission);
  • curvature of one or more links;
  • deformation of one or more teeth in the chainring or chainring;
  • the chain is stretched as a result of prolonged use;
  • incorrectly configured front or rear derailleur.

Now let’s take a closer look at each problem. Here we will also offer solutions to emerging difficulties.

Weak tension

If your chain goes off on a bike without gears, all you need to do is unscrew the two nuts on the rear wheel axle and then pull it towards you. Tighten the nuts, but make sure that the wheel does not move closer to the center of the frame. By following these steps, you will see that the chain will not sag. Accordingly, the likelihood that it flies again is completely excluded. But in the case of this problem, on a high-speed bike you will have to sweat. A special spring is installed in the gear selector, which automatically pulls the chain. With prolonged use, it loses its elasticity, which leads to similar problems. Since the transmission is not separable, you will have to change the switch to a new one.

Curvature of one or more links

Such a problem can be encountered quite rarely, but it can still bother you at any time. If you notice that the links are curved, you have two options. The first is to completely replace the chain. The second is to get rid of the bent links using a special squeeze. Do not use this method on bicycles without variable transmission. It is recommended to use this method as a temporary solution on models with gear derailleurs.

Bent link

Deformation of one or more teeth in the chainring or chainring

Why can teeth warp? The first obvious reason is due to impact, the second is due to severe wear. In any case, if the chain falls off solely due to problems with the cassette teeth, then it must be replaced with another one.

The chain is stretched due to prolonged use

This happens in the process of wear and tear. The switch spring cannot tension it normally, it constantly sags. In this case, there is only one way out. to replace the circuit with a new one. In practice, it is rare to find bicycles in which the chain is stretched and skips when shifting gears. It is virtually impossible to restore its elasticity.

An easy way to check chain tension

Front or rear derailleur incorrectly configured

This only happens on bicycles with gears. All you have to do is adjust the rear derailleur as precisely as possible. The problem is quite simple to notice: the chain can randomly jump to another gear in the process of turning the pedals with great force, but you will not press on the shifter petal. There are two bolts on the switch housing, with which you need to adjust the travel limit of the mechanism.

Rear derailleur adjusting bolts

If you see that your chain flies, it does not always mean that you need to change it entirely. It is possible that the problem lies elsewhere. If you do not want it to fly off at the most inopportune moment, we recommend that you carry out maintenance from time to time. Check the transmission very carefully for wear. A simple check before driving will help you avoid serious injury, especially if you prefer to ride in an aggressive or even extreme style. We hope that the tips above will help you avoid future breakdowns.

How to remove scrolling on a bike

The first step is to completely lubricate the chain mechanism and clean out all dirt.

Pay due attention to the space between the rollers and the sprockets. Before starting to repair the chain, it is necessary to remove the rear wheel, because without this procedure it will not be possible to dismantle the transmission

The next step is to replace the sprocket and associated chain. Replacement must be done in a comprehensive manner, otherwise all repairs will go down the drain and pedal overshoot on a regular bike will be a constant and long-term phenomenon.

How to fix this kind of breakdown? It is enough just to dismantle and remove the wheel, disassemble the hub mechanism into separate spokes, inspect and evaluate the parts of the hub, roller and cone axle for possible wear.

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You can, of course, try to take the cone to a specialized workshop for grinding, but this will be a waste of time, because the wear will not be eliminated in this way. It is necessary to completely change parts.

Eliminate scrolling on a bike

The troubleshooting work can be broken down into several steps, first removing the rear wheel to be able to remove the transmission. The chain and the entire chain mechanism must be cleaned and lubricated. The gaps between the rollers and the sprockets must be carefully processed, and then the sprocket and the chain must be replaced. You cannot limit yourself to one thing, because the mechanism works as an integral system: removing a minor malfunction does not mean that it has solved the problem. The repair itself comes down, in fact, to finding and then replacing the damaged part. When the wheel is removed, it is necessary to sort the bushing along the spokes, inspect each separately, check whether the roller is worn out and whether the cone axis is intact.

How to increase the tightness of the bike chain

The case with high-speed bicycles is much more complicated. How to chain a bike at speeds?

The transmission unit for bicycles with speeds, of which the bicycle chain is an element, consists of cassettes with several stars. Therefore, the repair work to eliminate chain slippage and sagging on such bicycles has its own nuances. To understand the causes of the problem, you must:

  • If the chain constantly flies on a high-speed bike, it is worth checking if the sprockets are not damaged. If one of the stars in the cassette unit is deformed, the chain can be thrown over another star to continue moving. But in this case, you need to understand that you cannot switch the speed. This method is suitable in order to get home for better repairs. To eliminate the damage, the deformed star will have to be replaced, and if the assembly is not collapsible and the entire cassette is malfunctioning, then it must be replaced.
  • the chain flies on a high-speed bike the reason is a failure to set the speeds. Check the quality of the setting. Very often, a failure in the speed setting will cause the chain to hit. The setting is made according to a special scheme.
  • After eliminating the root cause, the chain must be put back in place.

To properly fit the chain on a speed bike, you need to disconnect it using a squeeze. If you take a new chain, then you need to measure the required length, for which the chain is thrown over the large stars of the cassette blocks and connected, measuring the required distance. The excess piece of the chain is removed using a special squeeze tool. By turning the screw, the link axis is displaced and the unnecessary chain section is removed. Then the chain is passed between the speed switches and connected using the same tool.

If the chain flies on a children’s bike, then, depending on the design, the same actions are performed as with an adult bicycle.

A malfunction of the transmission unit on a high-speed bike can threaten the health and life of its owner, the cyclist can fly out of the saddle by inertia, so you need to remember to carry out preventive maintenance work on the chain, check the condition of the speed switch and the integrity of the main parts

It is especially important to carry out a technical inspection of your vehicle before starting the movement, in the event that you make long cycling and crossings. Timely diagnostics of your bike is a guarantee of safety

Now you know how to fix bike chain wear with your own hands. With the replacement of the necessary functional elements and the correct adjustment of the switches, the bike will ride like new again, delighting its owner with excellent speed and transmission on any part of the route.

The details of any mobile mechanisms, during their service, have the properties of being erased and becoming unusable for work. On a bicycle, these parts include: front, rear sprockets (cassette), bicycle chain and other mechanisms. Each unit in any technique requires proper care, this makes the parts work out their resource and contributes to reliability and long service.

But still, how not to care for the bicycle chain, there comes a time when it starts to slip, time and load gives its own. In such cases, do not pull to replace the chain, as this could damage the sprockets on the cassette and pedals.

First of all, you should make sure that the front and rear derailleurs are set correctly.

First of all, you need to pay attention to the hit of the chain on the sprockets and whether to lie between them. If the bike is not fast and there are no derailleurs, then the first reason for the chain slipping is its looseness.

In this case, it is necessary to tighten it.

If the switches are set correctly, and the circuit begins to slip under load, there are several reasons for this:

  • the chain is very stretched
  • front sprocket wear
  • wear of the sprockets on the cassette
  • or all of the above at once

Since when cycling, the chain inevitably stretches over time, the chain links no longer fit correctly on the teeth of the front and rear sprockets, and begin to wear them over time. The wear of the stars also occurs from the contamination of mechanisms with dust and dirt, so the chain must be periodically washed and lubricated. Read about how to do this in the article.

What to do if the chain starts to slip on the bike?

If, nevertheless, if your bike is already beginning to overshoot syndromes, then you need to prepare to replace the chain and sprockets. Get ready immediately for changing the chain and cassette, as the already stretched chain

could easily damage its teeth, it may be necessary to change the chainrings too, it is necessary to watch their wear.

In some cases, you can postpone the purchase of stars. It is necessary to look carefully at the teeth, as a rule, it happens that cyclists prefer to ride at several speeds, while others only use a small amount of time. After looking at the wear, try not to switch to the speed at which the maximum output, use other stars. But this is still not a long way out of the situation, it is better to replace the necessary element, and boldly ride, not forgetting to service it, clean it, lubricate it on time.

Consider a common mistake made by beginner cycling enthusiasts. chain skew due to incorrect gear selection. In this situation, not only the chain, but also the front and rear sprockets, wear out strongly. The gear change rule must be observed. For example, if the chain is on the front largest sprocket, then on the back you need to choose small. 1, 2, 3 stars.

For example, you should not drive uphill in heavy gears (large sprocket in front, small ones in the rear), since the load also strongly affects the stretching of the chain and wear of the sprockets, and besides, it is easier to change the correct gear and calmly continue driving with ease.

Check regularly that the gear derailleurs are set correctly, as they can also cause chain distortion and wear on the sprockets.

The chain slips on a bicycle under load: why and what to do, video of the repair. Chain slips on a bicycle under load. reasons, tips for elimination

Any type of cycling will always have a significant impact on its drivetrain. Why is a chain slipping on a bicycle and how to fix the problem? Chain and stars will wear off or deform over time.

To prolong their life, regular maintenance is recommended in the form of cleaning from dirt and dust and greasing. But even if all the rules for maintaining the transmission are followed, its parts will still wear out over time. Then their replacement is required.

Why does the chain slip on a bicycle

The first symptoms of transmission malfunction occur when shifting gears while depressing the pedals. Cyclists often notice this immediately when going uphill, because then the load on the bike is one of the strongest.

Reasons for chain slippage on a bicycle:

  • stretching of the chain due to wear of its links (in particular, their thinning);
  • wear of the stars;
  • two reasons at the same time.

Stretched chain

The most common cause is chain stretching due to long-term use of the bike, which causes the chain components to wear out. The main indicator of chain wear is its length (normally it is 304.8mm).

As a result, the spring on the derailleur does not tension the chain. This contributes to chain sagging and a decrease in the quality of gear shifting (which is especially noticeable when changing from low to high speeds).

It is almost impossible to restore the elasticity of a worn part. Therefore, there is only one way to solve the situation. replacing the chain.

Sprocket wear

The stars can deform due to wear or mechanical damage caused by impact. In both the first and second situations, it is impossible to restore the cassette teeth. Therefore, replacement with a new one is required.

Both factors at the same time

Also, the chain can slip due to the stretched chain and wear of the sprockets at the same time. This pattern is due to the following: as the distance between the chain rollers decreases, the sprocket teeth also narrow. To determine the degree of wear, it is enough to compare the widths of new and worn stars.

The reason for the one-time wear of the chain and sprockets is also incorrect gear shifting. This leads to a strong distortion of the chain, and on some parts of the parts there is increased pressure, and they wear out faster.

If the calipers are incorrectly adjusted, spontaneous jumps of the stars occur, the chain slipping or its jamming. In this case, the cyclist may be injured, and therefore the calipers need to be adjusted and checked in all positions. If the chain is dirty, it can also slip. Elimination of the symptom. timely cleaning and lubrication of the components.

What to do if the chain slips?

If the chain slips on the bike without gears, it is enough:

  • unscrew the nuts in the area of ​​the rear wheel axles;
  • pull the wheel towards you;
  • tighten the nuts, controlling the immobility of the wheel to the center of the frame.

Thanks to these actions, the chain on the bike will not sag without gears, which eliminates the risk of its collapse. On a high-speed bike, the problem solving algorithm is more complicated. In any case, circuit measurement is required.

Measuring chain stretch

Stretching the chain does not imply its elongation, it occurs when the links wear out, due to which the distance between them increases, and the chain wears out. There is some discrepancy in the pitch between the sprockets and the length of the chain link in the worn part. As a result, the cassette and the entire transmission system do not work properly.

To determine the degree of wear, you will need:

  • use a tape measure to measure 24 chain segments;
  • this can be done without removing the chain from the bike. on the top tensioned part;
  • normally the length of 24 segments is 30.5 cm;
  • the distance from 1 to 25 axis is measured.

Based on the results obtained, they understand how necessary a chain replacement is:

  • 30cm 48mm. new chain condition;
  • from 30cm 48mm to 30cm 64mm. normal length;
  • from 30cm 64mm to 30cm 79mm. the length indicating the chain is worn out, replacement is required, otherwise the first problems with the transmission will appear;
  • over 30cm 79mm. critical stretching, in such a situation, replacement of both the chain and cassette (or sprockets) is most often required.

With a stretch of 30.8cm, the ride becomes unbearable. The chain either gets stuck or slips and dangles. Some use a squeeze to shorten the chain by a couple of links, but this does not help to solve the problem for a long time, and as a result, they come to a solution to replace parts.

Replacing the chain and cassettes

When changing the chain, cyclists have difficulties that can be avoided by following the following algorithm:

After installing the chain, rotate the pedals in order to check the chain stroke. With proper installation, the new chain will not sag or fall.

When replacing cassettes, use:

  • key with chain;
  • adjustable;
  • retaining ring remover for bike cassette.

Algorithm for removing the cassette:

  • remove the wheel;
  • install a puller so that the spitz falls into the retaining ring;
  • place the handle of the key with the chain (whip) to the right of the cassette, and on the bottom of the chain, on the star, so that its links are tightly installed on its teeth;
  • put an adjustable wrench on the cassette remover, and turn it counterclockwise while holding the whip and preventing the stars from spinning;
  • unscrew the locking wheel;
  • remove and unfold the stars and washers in the order that there is no confusion during installation. this is the final stage of removing the cassette.

Algorithm for installing the cassette:

  • there are various grooves and pins with the same size on the sleeve and stars, with the help of which the installation will be in the required order;
  • before installing the cassette, lubricate the thread of the retaining ring;
  • put on stars and spacer rings alternately;
  • some models of cassettes require pressing the last asterisk during installation;
  • after installing the last sprocket, screw the retaining rings, check the correct installation of the sprockets, and if correctly installed, tighten the retaining ring with the cassette puller until it stops.

“Chain damper

To eliminate the risk of the chain flying off the stars, cyclists install anti-vibration devices. They can be equipped with rockrings. special plastic parts to protect stars from impacts when passing obstacles. curbs, pits and other.

How are they installed with ISCG dampers:

  • prepare tools: hexagons, squeeze, carriage pullers, threaded fasteners, keys for removing bonds and grease;
  • remove the stars and connecting rods so that the large star is set to the middle one;
  • screw rockring;
  • select the optimal position of the roller (with a 6-inch suspension travel, the position is strictly at 12 o’clock, with a smaller one. at 11:30);
  • tighten the bolts;
  • drip in the area of ​​the fastening bolts;
  • install connecting rods;
  • put stars on a chain;
  • fasten the rollers;
  • align the distance between the inner pancake and the star so that it is identical to the distance between the outer one and the star;
  • the chain should not touch the pancakes;
  • after tightening the bolts all the way.

If, during overshoots, the size of the chain and stars are correct, then the problem lies in the breakdown of the switches. This usually happens with a recent replacement of parts, and will wear in over time. In this case, the inconvenience is temporary. Other situations may require assistance from a service technician.

What to do if the bike chain slips? Link to main post

What to do if the bike chain slips under load

The bike is subject to constant care, especially if it is actively moving. When riding a bike, the chain and the stars rub against each other and wear out. To restore the transmission, it is important for the vehicle owner to learn how to repair the bike chain with his own hands. The procedure includes lubrication, cleaning parts from dirt and their partial or complete replacement.

Cycle chain and stars

The drivetrain loses ground as soon as you put the load on the bike. The problems are pronounced if the cyclist is heading uphill, and the model of the two-wheeled bike does not matter. single speed or high-speed transport. Experts identify several reasons why the chain slips on a bicycle under load:

  • links are lengthened due to wear;
  • teeth located on the sprockets in front and behind are worn out;
  • two parameters at the same time.

The last option is familiar to bike owners who previously repaired the chain or cassettes separately.

How to determine tooth wear?

To determine tooth wear, look at the snake size. The generally accepted standard for length is 304.8 mm.

When it is stretched, the teeth of small, and then large stars are susceptible to rapid grinding, which is why it becomes difficult to change gears on a bicycle.

Stretching the chain and inconsistency with traditional dimensions is impossible not to notice, moving from low speed to high.

As soon as the pitch between the rollers in the snake increases, the width of the teeth of the sprockets, on the contrary, decreases.

To determine this deviation from the norm, there is no need to use special equipment. just observe the operation of the bike, the malfunctions are visible to the naked eye.

How much the teeth are sharpened can be understood by comparing the thickness of the old star and any new one, only samples need to be taken of the same size.

Measuring chain wear with a vernier caliper

Transmission wear due to incorrect gear shifting

Not every bicycle owner knows how to use it correctly. skills come with experience, but while it is being developed, the risk of transmission malfunctions increases dramatically. Remember the basic rules:

  • When counting the stars at the front, start with the smallest.
  • On the rear cassette, the opposite principle works. the counting starts from the largest star.
  • When shifting gears, combine the combination of large chainrings in the front and small ones in the back.
  • You may have noticed that there are fewer sprockets on the front cassette. It is easy to conclude that there are several rear sprockets at once per one front sprocket. Consider this moment when changing gears.
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    Only by learning how to properly shift gears on a bicycle, you can avoid excessive distortion of the snake, which provokes wear and tear of parts at a rapid pace.

    How to troubleshoot a bicycle chain. What to do when components wear out

    The most common bike chain malfunction is component wear. The following signs indicate the deterioration of parts:

    • the snake turns or flies;
    • tensioner and derailleur performance poor.

    Experts recommend starting to replace the cassettes along with the snake. However, craftsmen offer their own instructions for the repair of old functional components. If the chain slips on the bike under load, remove it from the vehicle, straighten it and start measuring the length. The degree of wear is determined according to the indicators:

    • if the chain is up to 306.4 mm, the lengthening is insignificant, no global repair work is necessary, it is enough to repair the stars;
    • length up to 308 mm. medium wear;
    • more than 308 mm. the snake is already unusable Special tool for determining wear

    Now inspect the front and rear cassettes. Practice shows that stretching a bicycle snake up to 307.9 mm provokes not only wear on the bicycle chain, but also on the small and medium-sized sprockets at the back. If the matter is in the asterisks, it is not necessary to buy a whole cassette, you can get by with replacing only these components.

    Replacement should not be postponed if medium wear is set. Some bike owners wonder why the chain slip has only increased after installing a new part. This is due to the inconsistency of the pitch between the rollers and the width of the teeth. It will take a little time, and the components of the transmission will grind.

    Complex repairs involve stretching the snake up to 308 mm. it is impossible to ride a bike with a dangling chain. The element must be replaced together with the cassette. If you have the skill in repair work using a squeeze, try to shorten the chain by a couple of links.

    Alternatively, snake pacifiers are also used. The direct purpose of this convenient device is to use it to ensure driving safety if the vehicle is used in cycling. The damper is suitable for a last resort, for example, if it is impossible to give up riding a bike, and there is no money to buy new components for the bike yet.

    How to set the switches to work effectively

    If the condition of the chain is not in doubt, then the cause of inaccurate gear shifting is a deranged switch. This problem is faced by owners of two-wheeled bikes who have recently replaced the old chain and sprockets with new ones.

    The step-by-step instructions for adjusting the shifting mechanism consist of the following steps:

  • Achieve effective cable tension.
  • Adjusting the movement of relatively low gears.
  • Alignment of chain movement with orientation to the higher stars.
  • Pay attention to the rear sprocket system. if the tensioner is in the correct position, it will be possible to hide a little slack in the chain.

    To adjust the switch located at the rear, repeat these steps:

  • Unscrew the screw slightly and remove the cable suitable for the drive.
  • Mount the gears at the bottom with the chain in the 1: 1 position.
  • Rotate the screw until you match the guide roller with the sprocket.
  • Lock the cable in the derailleur.
  • Try pedaling, and at this time set the gears in the highest format. How to define it? The chain should line up with the small sprocket at the back and the largest sprocket at the front.
  • Another screw will allow the roller and active star to align.
  • Correct tensioner placement. 5mm from the bottom of the chainring, keep the bike chain in 1: 1 position.
  • Adjust the front derailleur in the same way.

    Now you know how to fix bike chain wear with your own hands. With the replacement of the necessary functional elements and the correct adjustment of the switches, the bike will ride like new again, delighting its owner with excellent speed and transmission on any part of the route.

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    Why does the chain slip on a bicycle? everything about cycling

    Sometimes bicycle pedals will slip, especially when a lot of force is applied to them. This is even more common when the cyclist steps on the pedals. To avoid chain slippage, the rider has to downshift and stay seated instead of standing in higher gears.

    Very often the switch is blamed for slipping and jumping the chain, as well as spontaneous gear shifting, but the phenomena listed above are very rarely caused by its improper operation.

    Why does the bike chain slip?

    Chain slip causes one of two unrelated phenomena. direct slip and spontaneous gear shifting.

    The main thing to solve the problem is to determine what exactly comes from the two cases. Chain bounce is when it bounces under load over the top of the sprocket teeth.

    Very often this happens when the chain is on the smallest star of the cassette, especially when it is used in conjunction with the smaller star of the system (which cannot be done). Also, sometimes overshoot can occur when the chain has bent links.

    Spontaneous gear shifting

    Spontaneous gear shifting occurs in the same way as overshoot, but only after it the chain is on another smaller sprocket (higher gear). The reason for this is the sum of two reasons. the flexibility of the frame and the friction of the cables.

    Another look at this topic:

    Bicycle chain worn. Take a section of the chain with the number of links in it. 20. Multiplying the number of links by the length of the standard link of 12.7 mm, we get the size of the section of the new chain of 20 links, equal to 254 mm. We take a ruler and measure.

    The most worn out parts of the bike. All parts of the bike are worn out, some fail faster, others last for years. The more a component is involved in work, the more its wear and tear and the more often it needs to be replaced.

    Mountain bike step. On mountain bikes, 24 gears are common. Chainring system with 42, 32 and 22 teeth and cassette with 11, 13, 15, 17, 20, 23, 26 and 30 teeth. Such a system with a cassette as an example and consider.

    Bicycle chain slips: what to do?

    Sooner or later, any cyclist faces this problem. over, the severity of its manifestations varies from just minor inconveniences when riding a bicycle to a complete chain flying off, injuries and loss of control.

    During my communication with a bicycle at various times, I came across, perhaps, with all possible reasons for the slip / fall of a bicycle chain, most of which, as a rule, are clear at first glance, and writing about them is the same as writing about that the sun is shining.

    However, as practice has shown, these reasons are not obvious for everyone, so let’s take it in order.

    Reasons for chain slip and how to eliminate them. Poorly adjusted calipers (one or both)

    Description of the problem: If, in the middle positions of the caliper, an incorrect adjustment can lead to the appearance of left sounds and a spontaneous jump to another sprocket, then in the extreme positions the chain dismount is fraught with either its complete flying off or jamming between the sprocket and the frame.

    In this case, the cyclist can be injured on the pedal, or, in general, fall.

    Remedy: adjust the calipers. over, it is better to do this in advance. And, importantly, you should check their work in all positions, including those that you do not switch to in ordinary life (such as 1-1, 1-8, 3-1, 3-8).

    This is important because there is another problem with caliper adjustment that I will mention here, although it does not touch the chain. If the end position is incorrectly set, the rear caliper at the moment of switching to the first (largest) sprocket can fall into the spokes, which is fraught with catastrophic consequences, such as breakage of the caliper and / or cock.

    Dirt (ice, rust, grass) in the calipers / chain / cassette

    Description of the problem: Mechanics tend to get dirty. The chain of a bicycle, abandoned at night after riding through puddles, becomes covered with rust and, if it was not lubricated enough, by the next morning it may stop bending on some links. Dirty calipers can also wedge and malfunction due to dirt and rust.

    In winter, ice is added to the above two troubles, and during summer off-road driving. grass winding on the rollers of calipers and cassette stars.

    Remedy: It’s trivial, but it is cleaning and lubrication. With preliminary melting of ice and unwinding of the grass, of course.

    If cleaning is not possible, then you can expose all the joints of the calipers and the chain to a treatment with WD-40 grease or a similar compound, this solves the problem in 90% of cases. Although, lubrication on top of dirt is, of course, ugly, but effective. With regular use of this method, the appearance of the bike becomes terrifying.

    Chain and cassette / system wear

    Description of the problem: Sooner or later this happens to any bicycle. Depending on the operating conditions, quality of parts and maintenance, the mileage to critical wear can range from 1.5-2 to 7-8 thousand km.

    The chain begins to slip first from time to time in certain gears with increased load, then the critical load becomes less and less, and the trouble spreads from the most overwritten gear to all the others. Visually, one can notice the sharpening of the sprocket teeth and the looseness of the chain rollers.

    Since the disease progresses gradually, you can ride on the killed iron for a long time, observing some caution.

    Remedy: Replacing the chain, cassette, system. Usually they change everything together. There is also a method of cycling several circuits every N kilometers (usually N = 500). This lengthens the normal life of the entire system as a whole.

    The author carried out a series of very long experiments, but it was not possible to obtain clear statistics, since different experiments involved different hardware, and operating conditions were different. That is, no one questions the positive effect, but its economic feasibility remains in question.

    Partial open circuit

    Description of the problem:

    On one of the links, one of the chain cheeks flew off the pin or broke and, clinging to the caliper / stars, leads to its spontaneous jumping / reset / jamming.

    A problem from the category of especially idiotic and obvious, however, I happened to first encounter it not so long ago.

    Remedy: Removing a defective pair of links from the chain using a squeeze, or replacing the entire chain.

    Twisting the chain

    Description of the problem: The chain is bent due to twisting of one or more links. This can happen when removing the chain that is stuck between the frame and the sprockets, or if it fails to fly off.

    I will dwell on this problem in a little more detail, with some departure from the main topic towards anti-advertising.

    If my ordeals with breakthroughs and searches for the truth are not interesting to you, go directly to the item “elimination”.

    The fact is that if you do not know, then you yourself can not guess about the very possibility of twisting the chain, how it happened to me. A symptom of such a defect is periodic chain hops, which have no clear correlation with the gear used and the load on the pedals.

    In my case, the inexplicability of the situation began to drive me crazy, especially in light of the very recent replacement.

    What to do if the chain slips under load on the bike?

    A bicycle is a complex of parts and movable mechanisms, which tend to wear out over time, break.

    One of the popular problems is when the chain slips, what to do? It is quite simple to get an answer to this question if you know the design features of a two-wheeled vehicle.

    It is also important to take into account the type of bike, operating conditions, maintenance of the technical condition of the device. Thus, you can significantly reduce the wear of all parts, ensure the performance of the bike and a comfortable ride.

    Even the simplest bicycle has a complex of interconnected parts. The precise and uninterrupted functioning of each element ensures the reliability and performance of the equipment.

    For example, many cycling enthusiasts have a question: the chain slips, what to do? To get an answer, you need to determine and eliminate the causes of such a situation, and for this it is worth knowing the design features of the vehicle.

    One of the main parts of the bike is the chain, which is stretched over the stars. Due to the rotation of these elements, movement along the track is carried out. In this case, even the simplest systems can fail, that is, the chain will begin to slip. This situation can arise for the following reasons:

    • Significant wear of the chain links, which leads to the elongation of this element;
    • Due to wear, the teeth of the front and rear sprockets are grinded;
    • Too much wear on the cassette stars;
    • The simultaneous impact of the above factors.

    Long-term and intensive operation of a bicycle without maintaining the technical condition, timely replacement of parts and their lubrication inevitably leads to disruptions in the performance of equipment.

    Most often, the chain slips due to a lack of proper and quality bike maintenance.

    That is why it is important to properly care for the technical device, performing inspection, lubrication and replacement of parts in a timely and regular manner.

    One of the common reasons for the rapid wear of the transmission is incorrect gear shifting.

    In any case, the sprockets, chain and all parts of the moving mechanism need regular maintenance to keep the bike in good working order.

    Timely lubrication of elements, replacement and careful operation of equipment allows you to avoid a long-term occurrence of such a situation when the chain jumps on a bicycle under load.

    After finding the answer to the question about the cause of the chain malfunction when the bike is loaded, it is worth subjecting the technician to repair. Such an event can be carried out independently, because the main reasons for wear and tear of parts and breakdown are known.

    In this case, all actions should be carried out very carefully, and the old elements need to be replaced with new ones with suitable dimensions.

    Such a careful approach allows you to quickly and efficiently change the necessary parts of the system and ensure the bike‘s performance under optimal load.

    With large stretching of the links, the probability of damage to small and medium stars is quite high. Therefore, a thorough examination of these elements is important and allows you to determine the next steps.

    If the sprockets are worn, the sprockets of the required size should be selected and the cassette renewed. An alternative option for replacing parts is to install a special “damper”, which maximizes the life of damaged elements.

    One of the most common causes of circuit problems is inaccurate switch settings. In this case, the bicycle chain slips under load.

    In this case, it is necessary to adjust the switches, and for this you need to set the appropriate tension for all cables, adjust the travel in the lowest gears and optimize the travel along the large stars.

    In this case, you should take into account the features and characteristics of technology.

    Causes of pedaling on a bicycle and their elimination

    Why pedals on a bike? Most cycling enthusiasts face a similar problem. But even if you are a beginner and only recently purchased a bike, you should definitely know what the problem is, how to avoid it and what to do in such a situation.

    Scrolling pedals on a bike

    Pedaling: what are the problems and what are the causes

    If a malfunction occurs for the first time, it can be difficult to determine what exactly it is. Signs of a pedaling problem:

    • The wheel does not spin or does not spin enough;
    • The bike chain slips while riding;
    • Increase in freewheel.

    Sprocket wear is the reason

    In general, the reasons why the pedals on the bike are spinning are:

  • Worn bike sprocket cranks. There is no need to undergo a technical inspection to establish this reason: the problem is obvious. When worn, the cranks on the sprocket appear worn and worn. A similar problem can arise from natural causes: the bike is simply old enough and already worn out. Or, while riding, the cyclist exerts too much force by applying excessive pressure on the pedals.
  • Why does the rear sprocket spin on a bike? The reason may also lie in the lack of regular technical inspection and insufficient washing: perhaps the sprocket on the bicycle is simply dirty.
  • Chain problem, which is one of the most common. The reason, as in the case of the wear of the sprocket cranks, may lie in the old age of the bike and not in regular maintenance. Perhaps the chain just needs washing and sufficient lubrication;
  • Rear ratchet problems can be due to several reasons. Many people sin by using too much oil or grease with an increased thickness. This could cause the ratchet to malfunction. It can also be caused by dirt and dust mixed with oil, or a broken bearing.
  • Bicycle sprocket crank problems: what to do

    Once you’ve identified the source of the problem. the cranks. and figured out the cause, you can start fixing it. The simplest case is sprocket contamination.

    Just rinse the parts thoroughly, wipe with a dry, lint-free cloth and let dry. Never lubricate parts wet! After thoroughly drying, you can lubricate with special oil.

    READ  How To Adjust The Rear Derailleur On A Bike

    An important point: there should not be too much grease, otherwise it will again lead to malfunctions.

    If the sprocket is “lapped”, then it must be removed, disassembled, cleaned of dirt. A worn sprocket may need to be replaced or its teeth sharpened.

    Even if the sprocket on the bike can be repaired, it will not last long, so it is better to spend money on repairs right away.

    If you have never done anything like this before and you are worried about scrolling on the bike, repair is the best solution.

    Solving rear ratchet and chain problems on your bike

    As in the previous case, the ratchet must be thoroughly cleaned, dried and lubricated. perhaps this will be enough. If not, the wear problem of individual ratchet sprockets is solved by replacing them. In addition to sprockets for replacement at home, a key is purchased.

    Lubricate the chain after cleaning it, you need to drip a drop onto each (this is important) link of the part. Look carefully to see if the chain has bent links. If so, then they must be carefully brought back to their original position. If the chain is stretched or worn too much, then it must be replaced with a new part.

    Bicycle chain worn

    In this case, you need to either use the bike until the problem is solved on its own (the chain reaches a certain level of wear), or (which is preferable), replace the entire transmission in a repair shop. A transmission is the mechanism that sets a bicycle in motion. It includes sprockets, chain and cassette (rear sprockets).

    Switch settings are incorrect

    What to do to avoid pedaling?

    The most common cause of spinning on a bike is chain failure. Therefore, you should pay close attention and care to her in order to avoid possible problems.

    Before using them, first rinse the chain in water. After thorough drying, liquid or aerosol lubricants can be used.

    Avoid greases that are too thick or old.

    As you can see, many problems with the bike, including pedaling, can be easily solved: often washing and lubricating the part is enough.

    Do not forget to regularly wash and lubricate the “iron horse”, as well as regularly carry out maintenance, and your bike will delight you for a long time.

    The pedals on the bike are spinning. the reasons and methods of fixing the problem

    Bicycle pedaling is a common problem faced by every owner of this two-wheeled vehicle. The reason for this condition can be both worn out parts of the bicycle and improper care of the vehicle. This article will discuss the most likely causes of pedaling on a bike and how to solve the problem.

    Contents: 1. If the cranks of the bicycle sprocket are worn out 2. If there are problems with the rear ratchet 3. If there are problems with the transmission

    If the cranks of the bicycle sprocket are worn out

    In general, problems with an asterisk can be detected with the naked eye without proper experience.

    First of all, you need to pay attention to the force with which you have to press on the pedals when driving. if you need to make tangible efforts, then the problem is in the sprocket.

    And this leads not only to scrolling the pedals, but also to stretching the chain, and then there is only one way out. to completely replace the bicycle chain with a new one.

    There are 2 more options:

  • The sprocket is simply “worn out” (licked off). this happens when the bike is used for a long time and in the absence of proper care of the vehicle. With this problem, poor grip is observed, which provokes pedaling.
  • The sprocket is too dirty. you will have to thoroughly clean it with special liquids or fine-grained sandpaper.
  • If there is a problem with a worn out asterisk, then you need to do the following:

    • remove the rear sprocket;
    • disassemble the asterisk;
    • if necessary, replace parts with new ones or sharpen the sprocket teeth.

    Please note: Experienced cyclists recommend a complete replacement of the drive mechanism and have it done in a specialized workshop.

    If there is a problem with the rear ratchet

    The ratchet may malfunction if too much oil has been used to lubricate the ratchet, or, conversely, if there is no lubricant in this part of the bike.

    The ratchet bearings may even sprinkle or start to stick.

    In any case, you will need to remove the ratchet and carefully inspect it. if necessary, replace the bearings, clean the parts from dirt and dust with special fluids, lubricate everything thoroughly. these simple manipulations can already eliminate pedal spin.

    It is worth considering that before disassembling the ratchet and treating it with lubricants, it is worth looking at it under good lighting. you can immediately see how dirty the parts are and whether there is oil there. In this case, no disassembly / cleaning / lubrication work is necessary. look for another cause of the problem in question.

    If there are problems with the transmission

    Experienced experts believe that when scrolling the pedals, first of all, you need to pay attention to the transmission. it must be cleaned and thoroughly lubricated with special agents. Particular attention should be paid to the sprockets and the inter-roller space of the chain. To remove the chain for processing, you will have to dismantle the wheel.

    If, even after cleaning the transmission, the pedaling problem persists, then it is advisable to completely replace the entire set.

    You can repair or replace the rear hub. this will be a cardinal solution to the problem in question. We act as follows:

    • remove the wheel from the bike;
    • we carry out the spacing of the sleeve;
    • we inspect the axle and rollers of the cone, bushing bearings for the level of wear.

    Please note: some “craftsmen” give the taper for processing on a lathe. This approach to solving the problem can delay the cranking of the pedals, but sooner or later, the rear hub set will have to be replaced in any case.

    What to do if the bike chain slips under load?

    During high-speed riding, racing on rough terrain and even on relaxed cycling, the moving parts of the bicycle are subjected to high mechanical stress. They actively rub against each other, which over time affects the condition of the metal, even with regular cleaning and lubrication of the bike. The wear of the transmission parts causes the chain to slip on the bike under load. Every cyclist faces this, and everyone should know what to do in such a situation.

    Reasons for malfunction

    The problem happens when the load on the bike’s drivetrain is at its maximum. when going uphill or when changing gears. This happens for several reasons:

    • malfunction of the speed switch or its misuse;
    • wear of the stars on the cassette or pedals;
    • chain stretching;
    • complex wear of the gear shift system.

    Let’s take a closer look at the problem of chain slipping on a bicycle.

    If the chain bounces on the bike at speeds, the first step is to make sure the gear derailleur is adjusted correctly. The bike is turned over and placed on the saddle, then you should spin the pedals with your hands and switch the speeds. [attention type = red] Tip! It is required to pay attention to how the chain jumps between the stars, whether it falls into the gaps between them. [/ Attention] If the problem occurs on a single speed, the problem should be looked for in the wear of the parts. Most often, the entire transmission wears out at once. in cases where its elements have not been replaced separately. The wear rate increases if the parts are contaminated with abrasive materials such as sand.

    You can determine why the chain slips on a bicycle under load by assessing the state of the chain. The wear rate is based on the increase in its length. Initially, it varies depending on the bike type and number of links, but the procedure for determining wear is the same, since the length of one link is always 12.7 mm, or 1/2 inch. You can measure a separate area with a ruler. 20 links are enough. In good condition, its length should be 2012.7 = 254 mm. If it is 3-4 mm larger, then the degree of wear is serious enough to require replacement.

    The stretching of the links leads to accelerated wear of the small stars, which makes the speeds begin to shift worse, especially when moving from large to small stars. And over time, the cassette may fail altogether, because of which it will have to be removed and replaced. You can assess the degree of wear of the sprocket teeth by eye by comparing the part used with a new one having a similar diameter.

    Many people do not consider their gear shifting technique when thinking about why the chain slips on a speed bike. misuse of the derailleur can also cause the transmission to wear quickly. You need to know a few rules:

    • The numbering of stars at the pedals goes from lower to higher, in the cassette. vice versa.
    • It is necessary to include a smaller gear at the front and a larger one at the rear and vice versa, that is, combine stars of different sizes in order to avoid skewing.
    • For each chainring there are several rear.

    [attention type = red] Important! Correct use of the bike is a guarantee of slow wear of the transmission, attrition of the stars. [/ Attention]

    Debugg

    So what to do if a chain slips on a bike under load? The easiest option is to completely replace the transmission. However, this is not necessary, you can determine the most worn out part of the system and repair only it.

    It is necessary to change the stars only in extreme cases. However, this is a temporary solution. Eliminate the cause of the malfunction. replace, shorten the chain or adjust the switch.

    Depending on the degree of wear of the part, the following repair methods are used:

    • complete replacement. in this case, breakthroughs can happen even more often at first, but over time, the parts will rub in, and the problem will be eliminated (while you do not forget to lubricate the unit so that it does not work for wear);
    • shortening. several links are removed using a squeeze;
    • use of a damper. a device that increases the tension of the chain using rollers, preventing it from jumping off the sprockets.

    [attention type = red] Important! If there is no strong wear, but the chain still slips on the bike, you need to set the tensioner in the correct position and adjust the tension of the cables. [/ Attention]

    The most difficult part of troubleshooting will be working with the chain. if it does not have a special lock, even removing it from the bike may be a problem. The video explains in detail how to separate and remove excess links.

    What to do if a chain slips on a bicycle?

    Any type of cycling will always have a significant impact on its drivetrain. Why is a chain slipping on a bicycle and how to fix the problem? Chain and stars will wear off or deform over time.

    To prolong their life, regular maintenance is recommended in the form of cleaning from dirt and dust and greasing. But even if all the rules for maintaining the transmission are followed, its parts will still wear out over time. Then their replacement is required.

    Why does the chain slip on a bicycle

    The first symptoms of transmission malfunction occur when shifting gears while depressing the pedals. Cyclists often notice this immediately when going uphill, because then the load on the bike is one of the strongest.

    Reasons for chain slippage on a bicycle:

    • stretching of the chain due to wear of its links (in particular, their thinning);
    • wear of the stars;
    • two reasons at the same time.

    Stretched chain

    The most common cause is chain stretching due to long-term use of the bike, which causes the chain components to wear out. The main indicator of chain wear is its length (normally it is 304.8mm).

    As a result, the spring on the derailleur does not tension the chain. This contributes to chain sagging and a decrease in the quality of gear shifting (which is especially noticeable when changing from low to high speeds).

    It is almost impossible to restore the elasticity of a worn part. Therefore, there is only one way to solve the situation. replacing the chain.

    Sprocket wear

    The stars can deform due to wear or mechanical damage caused by impact. In both the first and second situations, it is impossible to restore the cassette teeth. Therefore, replacement with a new one is required.

    Both factors at the same time

    Also, the chain can slip due to the stretched chain and wear of the sprockets at the same time. This pattern is due to the following: as the distance between the chain rollers decreases, the sprocket teeth also narrow. To determine the degree of wear, it is enough to compare the widths of new and worn stars.

    The reason for the one-time wear of the chain and sprockets is also incorrect gear shifting. This leads to a strong distortion of the chain, and on some parts of the parts there is increased pressure, and they wear out faster.

    What to do if the chain slips?

    If the chain slips on the bike without gears, it is enough:

    • unscrew the nuts in the area of ​​the rear wheel axles;
    • pull the wheel towards you;
    • tighten the nuts, controlling the immobility of the wheel to the center of the frame.

    Measuring chain stretch

    Stretching the chain does not imply its elongation, it occurs when the links wear out, due to which the distance between them increases, and the chain wears out. There is some discrepancy in the pitch between the sprockets and the length of the chain link in the worn part. As a result, the cassette and the entire transmission system do not work properly.

    To determine the degree of wear, you will need:

    • use a tape measure to measure 24 chain segments;
    • this can be done without removing the chain from the bike. on the top tensioned part;
    • normally the length of 24 segments is 30.5 cm;
    • the distance from 1 to 25 axis is measured.
    chain, bike, load

    Based on the results obtained, they understand how necessary a chain replacement is:

    • 30cm 48mm. new chain condition;
    • from 30cm 48mm to 30cm 64mm. normal length;
    • from 30cm 64mm to 30cm 79mm. the length indicating the chain is worn out, replacement is required, otherwise the first problems with the transmission will appear;
    • over 30cm 79mm. critical stretching, in such a situation, replacement of both the chain and cassette (or sprockets) is most often required.

    With a stretch of 30.8cm, the ride becomes unbearable. The chain either gets stuck or slips and dangles. Some use a squeeze to shorten the chain by a couple of links, but this does not help to solve the problem for a long time, and as a result, they come to a solution to replace parts.

    Replacing the chain and cassettes

    When changing the chain, cyclists have difficulties that can be avoided by following the following algorithm:

    When replacing cassettes, use:

    • key with chain;
    • adjustable;
    • retaining ring remover for bike cassette.

    Algorithm for removing the cassette:

    • remove the wheel;
    • install a puller so that the spitz falls into the retaining ring;
    • place the handle of the key with the chain (whip) to the right of the cassette, and on the bottom of the chain, on the star, so that its links are tightly installed on its teeth;
    • put an adjustable wrench on the cassette remover, and turn it counterclockwise while holding the whip and preventing the stars from spinning;
    • unscrew the locking wheel;
    • remove and unfold the stars and washers in the order that there is no confusion during installation. this is the final stage of removing the cassette.

    Algorithm for installing the cassette:

    • there are various grooves and pins with the same size on the sleeve and stars, with the help of which the installation will be in the required order;
    • before installing the cassette, lubricate the thread of the retaining ring;
    • put on stars and spacer rings alternately;
    • some models of cassettes require pressing the last asterisk during installation;
    • after installing the last sprocket, screw the retaining rings, check the correct installation of the sprockets, and if correctly installed, tighten the retaining ring with the cassette puller until it stops.

    “Chain damper

    To eliminate the risk of the chain flying off the stars, cyclists install anti-vibration devices. They can be equipped with rockrings. special plastic parts to protect stars from impacts when passing obstacles. curbs, pits and other.

    How are they installed with ISCG dampers:

    • prepare tools: hexagons, squeeze, carriage pullers, threaded fasteners, keys for removing bonds and grease;
    • remove the stars and connecting rods so that the large star is set to the middle one;
    • screw rockring;
    • select the optimal position of the roller (with a 6-inch suspension travel, the position is strictly at 12 o’clock, with a smaller one. at 11:30);
    • tighten the bolts;
    • drip in the area of ​​the fastening bolts;
    • install connecting rods;
    • put stars on a chain;
    • fasten the rollers;
    • align the distance between the inner pancake and the star so that it is identical to the distance between the outer one and the star;
    • the chain should not touch the pancakes;
    • after tightening the bolts all the way.

    If, during overshoots, the size of the chain and stars are correct, then the problem lies in the breakdown of the switches. This usually happens with a recent replacement of parts, and will wear in over time. In this case, the inconvenience is temporary. Other situations may require assistance from a service technician.