How to tighten a chain on a bike without speeds

Adjusting the tension on a bike without gears

A properly tensioned chain on a bike without speeds should be slightly free by an amount of sag of about 5 mm.

To tighten the chain on a regular speed bike, you need to:

  • Put your transport wheels upside down.
  • Loosen the nuts or eccentrics of the rear wheel.
  • Adjust the correct amount of chain slack by sliding the wheel along inclined slots called dropouts.

It is necessary to fix the rear wheel only in the position when its axis is parallel to the carriage shaft.

If the chain is too tight, it becomes very difficult to pedal on the bike, the parts of the chain drive wear out quickly. Whereas the sagging chain can jump off the asterisks, and it will definitely be impossible to go further.

If the wheel is already against the edge of the dropouts, there is nowhere else to move it, and the chain belt is still dangling, then you will need to remove a couple of links.

Removing links

Collapsible chains are placed on a regular bicycle without speeds; they have a lock on one of the links. Most modern speed bikes use non-separable chains with all the links riveted equally well. It is not difficult to disassemble a one-piece riveted chain, it is enough just to grind the heads of the pins on one of its links on emery. It is even easier and more accurate to disconnect the rivets using a special tool. squeeze.

It should be noted that pomace is a versatile tool. With its help, you can not only squeeze out the locking pin, but also re-rivet the disassembled chain. Many squeezes have two working grooves: one is needed for pressing the pin out of the roller, and the other is for pressing it in. A mounting location farther from the pressure screw is for ripping the chain pins. You can learn more about using such a tool in the following video.

Adjusting the bike with speeds

The amount of chain tension on a bike with a rear parallelogram derailleur is determined entirely by the force of the derailleur spring. But if the chain is too long, then this tensioner will not be able to compensate for its slack, and it will begin to hit the frame. This is especially true for bicycles with a short rear thrower. Too short chain makes gear shifting difficult. It will cause accelerated wear of the transmission parts. This primarily applies to two-suspension bicycles.

Very often, when installing a new chain on a high-speed bike, it is necessary to shorten its length, that is, remove several links.

There are two ways to determine how many links to remove:

tighten, chain, bike, speeds

  • Place the chain on the largest sprockets at the front and rear. Pull on it, pushing the rear derailleur all the way forward. Now it only remains to add two links, and the optimal length will be determined.
  • Place the chain on the front of the largest sprocket and on the back of the smallest sprocket. Pull up the chain until the rear derailleur frame points straight down, more precisely, when the derailleur roller axles become one vertical line.

On double suspensions, it will be more correct to adjust the chain length by pressing the rear swingarm down to the position when the front sprocket cassette is as far as possible from the rear ratchet. By marking the desired length, extra links can be removed.

How to tension and adjust a bicycle chain

An important element for the bike’s performance is the chain, the life of which depends on timely care. When working, it should not crack and creak. It is normal that during operation it gradually wears out and, as a result, lengthens. When adjusted correctly, the chain should have a slack of 10-12 mm. When pulled with your fingers, it should give in by 10-15 mm, and if this value is greater, then it must be pulled. Note that this is only relevant for bicycles or without derailleurs, or with planetary gears.

It is also important to adjust the tension when installing a new chain. It is even more important to tighten it after the first three arrivals. A new part stretches very quickly during the first time of operation.

Chain slippage

The chain starts to slip when the tension is released due to its extreme tension. And when overstretched, it, in turn, quickly wears out the sprockets. So by putting a new chain on an old ratchet, you may not achieve anything. All the same, slipping on small stars will remain.

If this is not the first time you tighten the old chain, get ready to replace it soon. Remember that you can only remove two links from it once. In the end, you still have to spend money on a new part.

Signs of the need for a procedure

On bicycles that have a planetary hub or don’t have speed derailleurs, it is easy to determine when the chain needs to be tightened. To check, you need to pull it down until it stops. If the distance that it travels is more than 1-1.5 cm, then adjustment is required.

However, you do not need to drag the chain. Intense tension causes an increase in the load during travel and rapid wear of the transmission. If, when pulled down, its travel does not exceed 5 mm, then a slight relaxation is required. But this must be done carefully, since a too loose chain can fly off the sprockets.

There are several methods to determine if you need to tighten the chain on a speed bike:

  • The position of the speeds is set so that the chain is located on the largest stars in the front and back. Then you need to pull it down and towards the front wheel until the rear derailleur reaches the stop. If after this procedure there are no more than 2 free links, then there is no need to adjust the chain length.
  • The chain is set to the largest star in the front and the smallest in the back. In this case, the guide roller and the roller of the rear crossover tensioner must be on the same axis perpendicular to the ground. The required length on 2 suspensions is determined in this way: you should press on the pendulum until the cassette of sprockets in front leaves the greatest distance from the ratchet. This is the best position to measure the required chain length.

How to tighten or tighten a bicycle chain?

Using a bicycle leads to wear and tear on its parts, including the chain sagging. To quickly fix the problem and avoid unpleasant situations, you need to know how to tighten the chain on the bike, as well as how to shorten, remove or replace it.

Chain tension

Precise chain tension is essential for normal bike use. Excessive tension makes it difficult to pedal. In addition, the components of the chain drive quickly deteriorate. If the element sags too much, then the risk of its jumping off during movement increases.

Cycling without gears

When tensioning the chain on a regular bicycle, keep in mind that tight tension is not allowed. The optimal size is no more than 5 mm.

First, you need to turn the bike over, first placing a soft material under the seat. This will avoid damage. Then loosen the 2 nuts securing the rear wheel. To adjust the slack to the desired level, the wheel gently slides along the sloped grooves. After reaching the set level of adjustment, the wheel is re-fastened with nuts. They need to be tightened firmly, but without much effort, so that they are not damaged.

The operation of the device must provide free pedal travel. At the end of the work, you should check how the bike is functioning, and also make sure that the wheel axle is parallel to the carriage.

On a vehicle with speeds

The tension of the chain drive on the vehicle at speeds is carried out by the spring force of the derailleur itself. But if its length is excessively long, then it will be impossible to remove the sag with the help of the tensioner. In such a situation, when driving, the chain will hit the surface of the frame.

If the length is less than necessary, then there will be difficulties with gear shifting. In addition, transmission elements will wear out faster.

To shorten the element, first of all, you need to place it on the largest chainring and chainring. Then pull it and slide the switch forward until it stops. To determine the best length, add 2 links.

Another method places the chain on the largest star in the front and the smallest in the back. It is pulled up until the roller axes are on the same vertical. The length of the chain is adjusted on 2 suspensions. The rear swingarm is locked in such a way that the distance between the rear ratchet and the front sprocket is maximum. After determining the required length, the extra links are removed.

Slipping like a chain drive defect

Every cyclist is familiar with the problem of chain slippage. The chain will stretch over time and the tension will loosen. In addition, chain stretching leads to quick wear of the bike sprockets. It would seem that what is easier. you just need to remove 2 links. But the “trick” is that you can do this only once, and then you need to change the chain.

And further. A new chain on an old ratchet is not ice at all. Slipping will probably remain on small sprockets. So you need to change the ratchet too.

How to tighten a chain on a bike at speeds?

Speed ​​bikes have a more complex chain tensioning principle. There it is regulated by a special spring located on the rear carriage. Accordingly, adjusting the chain tension by simply moving the rear wheel will not work.

READ  DIY Bicycle Chain Tensioner

The only available way to tighten the chain on a speed bike is by removing the chain links. This procedure is carried out in the same way as described in the paragraph about ordinary. You will also need a special squeeze and a few minutes of time.

How to tension a chain on a regular bike?

The first and easiest way is to offset the wheel. It is implemented in the following way:

  • We turn the bike over and put it on the handlebar and harness. You can also use dedicated stands for repair and maintenance.
  • We loosen the bolts or eccentrics with which the wheel is attached to the frame itself.
  • We begin to move the wheel along the landing grooves. If the chain should be loosened, then the wheel should be moved towards the front wheel, if pulled, then vice versa.

After completing the adjustment, it is important to check that the axis of the rear hub is perpendicular to the longitudinal axis of the bike itself, only in this case the wheel can be fixed.

The second way is to remove the extra links. This can be done using the “old-fashioned method”, knocking out the link roller with some thin elongated object. But this approach requires a lot of time and effort, and there is a high probability of simply damaging the chain.

It is much easier to purchase a special squeeze that will allow you to remove an extra link in a matter of seconds, minimizing the likelihood of damage to the chain. How to do it?

  • We take one link of the chain, put it in a special groove on the squeeze and gently squeeze it with a lock.
  • We twist the arrow knob clockwise, slowly squeezing the roller out of the plates. IMPORTANT! The roller should not be squeezed out completely, because then it will be extremely problematic to return it to its place.
  • After parsing one link, we disassemble the chain and determine the number of extra links, removing them in the same way as described above.
  • We connect the ends of the chain and press the roller using a squeeze.

I would like to note right away that this procedure requires a certain skill and for the first time may require a lot of time and effort.

Adjusting the tension on a bike without gears

A properly tensioned chain on a bike without speeds should be slightly free by an amount of sag of about 5 mm.

To tighten the chain on a regular speed bike, you need to:

  • Put your transport wheels upside down.
  • Loosen the nuts or eccentrics of the rear wheel.
  • Adjust the correct amount of chain slack by sliding the wheel along inclined slots called dropouts.

It is necessary to fix the rear wheel only in the position when its axis is parallel to the carriage shaft.

If the chain is too tight, it becomes very difficult to pedal on the bike, the parts of the chain drive wear out quickly. Whereas the sagging chain can jump off the asterisks, and it will definitely be impossible to go further.

If the wheel is already against the edge of the dropouts, there is nowhere else to move it, and the chain belt is still dangling, then you will need to remove a couple of links.

How to know if the chain needs to be changed?

Any mechanism loses its properties over time. In bicycle components, the pins that connect the links together are subject to wear. The standard distance for pins is set to 12.7 mm. The longer the bike is used, the greater this distance becomes.

The appearance of wear negatively affects the operation of the switch, and also additionally loads other elements of the transmission.

Installing a new chain will wear out the sprockets. It happens in this way: the new mechanism is firmly held on the star, and the roller is fixed on the pin. During operation, the pin moves in the roller and increases the distance between the teeth of the star.

Experts recommend assembling every 1500-2000 km of run. This value depends on the type of bike, the conditions in which it is used and the quality of lubrication.

In order to keep your bike in perfect condition, you must adhere to the rules of its use. It is much better to detect the problem immediately, in order to fix the breakdown in time and prevent further wear.

Adjusting the bike with speeds

The amount of chain tension on a bike with a rear parallelogram derailleur is determined entirely by the force of the derailleur spring. But if the chain is too long, then this tensioner will not be able to compensate for its slack, and it will begin to hit the frame. This is especially true for bicycles with a short rear thrower. Too short chain makes gear shifting difficult. It will cause accelerated wear of the transmission parts. This primarily applies to two-suspension bicycles.

Very often, when installing a new chain on a high-speed bike, it is necessary to shorten its length, that is, remove several links.

There are two ways to determine how many links to remove:

  • Place the chain on the largest sprockets at the front and rear. Pull on it, pushing the rear derailleur all the way forward. Now it only remains to add two links, and the optimal length will be determined.
  • Place the chain on the front of the largest sprocket and on the back of the smallest sprocket. Pull up the chain until the rear derailleur frame points straight down, more precisely, when the derailleur roller axles become one vertical line.

On double suspensions, it will be more correct to adjust the chain length by pressing the rear swingarm down to the position when the front sprocket cassette is as far as possible from the rear ratchet. By marking the desired length, extra links can be removed.

How to properly tension the chain on a bike?

Every bicycle owner must be able not only to move around on it, but also to take proper care of it, providing repair actions if necessary. Chain problems can arise at any time, regardless of the price and type of bike.

In order to diagnose the problem in time, you should know the basic rules and nuances of replacing circuits. These rules are necessary for all drivers, because a person’s life depends on the condition of the vehicle.

Adjustment on speed bikes

How to tighten the chain on a bike at speeds such as a mountain bike? For a high-speed bike, if tightening the links in the first two methods did not give the desired result, then you can try two other methods.

The first method only works for high-speed bicycles that have already traveled with a weakened spring, that is, with an old derailleur. On a new one, you simply cannot do it manually. First step. remove the links from the gears. Next, knock off the stopper on the switch and rotate the switch in the direction of greater spring tension.

The second method of chain tensioning on a bike at speeds is not difficult at all, but sometimes it works. In order for the system to work efficiently, it is sometimes sufficient to simply tighten the derailleur cable.

How to chain a bike

How to chain tighten on a speed bike?

How can this be done? To begin with, it is reasonable to simply understand whether it is necessary to engage in tensioning the chain on a bicycle or change it, since this step is important for adequate work great. There are several signs to determine the need for this work. If, when moving, it began to rattle and jump off a little and now and then slips, then this is the first sign that it requires a new tension or it needs to be shortened. If you visually notice that the part of the bike began to sag more than usual (since the chain is not stretched all the way, then it should have a slight sag, but if the length has increased noticeably, it means that it has stretched and needs to be pulled or changed). If on a speed bike it has become difficult to adjust the gearshift settings. And when you clearly understand that it’s time to clean the chain.

Loose chain tension

On regular road bikes, the chain is not that difficult to tighten. To do this, remove the rear wheel and pull it back in the fork. The main thing here is not to overdo it and not to overtighten. Loosely taut and taut. are equally problematic when driving, so it is important to stop in time to keep the chain at medium tension.

If it is stretched to such an extent that it is no longer possible to cope with a simple suspension of the wheel, but you do not consider it necessary to change it, since it slips noticeably, then it makes sense to remove it and knock out one or more links and shorten it in this way. This is not a difficult action. In this case, your task. ensure that the length of the chain is the same as it was originally. In this procedure, the most important thing is to re-fasten the links with such a reliable lock so that it is firmly held, because even stretched is better than suddenly torn when moving. If you are not sure that you can re-fasten the chain, then it is better not to take this step.

Replacement

Sometimes you have to resort to a complete replacement. To do this, the old one will need to be removed, and the new one installed.

  • To remove the old chain, you will need to use a special tool. squeeze. Having set the squeeze of the chain opposite any roller, they begin to tighten the screw so as to squeeze out the pin. Then the tool is loosened and removed. The device is also removed with the help of a squeeze in order to regularly clean.
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For replacement, you need a chain with the same number of links as the old, but shorter. To tighten, carefully place it on the gears and the derailleur in the same position as in the previous position of the links. Carefully fitting the rollers onto the gears, leave the two teeth open at the bottom. This step will make sure that the installation of the new one went right. Use the squeeze again to re-install the new pin. Both ends of the chain fit into the tool cavity to form a hole for the pin to be pulled out. Place your finger against the hole and gently, without haste, tighten.

Last step. installation in place of the pin. Make sure the pin goes in smoothly and easily. If resistance is felt, it means that both ends are incorrectly set and this needs to be changed. When installed correctly, the pin should fit snugly inside the roller, but it will not be difficult to place it.

Quite often, cyclists use a lock to quickly change or remove and clean the chain. On the one hand, this is convenient as it allows you to quickly remove the chain with a lock, on the other hand, it is better to leave a new chain intact at least until the start of regular suspenders, when it becomes clear how much more convenient it will be to use a replacement with a lock. Many cyclists have prejudices about the lock, as the chain supposedly breaks with it more often. There is no reliable data, but the new chain looks more reliable for most without a lock.

Do not forget that for a safe ride, you need to carefully monitor the operation of the bike and promptly eliminate all technical problems and change worn parts.

Adjusting chain tension on bicycles without gears

For bicycles to function flawlessly without speeds, their chain must not be too tight. It is necessary to ensure its free sagging for a length of up to 5 mm. And in order to pull in this way, you need to perform a certain set of actions in the correct sequence:

  • Turn the vehicle over with the wheels up.
  • Loosen the rear wheel. unscrew the nuts or fastening eccentrics.
  • Adjust the chain slack to the required amount. To do this, you need to carefully move the wheel along the inclined grooves (dropouts).
  • At the end of the adjustment, the wheel should be fixed in its original position again. In this case, the wheel axle must be parallel to the carriage shaft.

If the chain is too tight, it will become difficult to pedal. And the elements of the chain drive will very soon become unusable. It is also bad if the bike chain is too slack. She will simply jump off the stars at a certain moment and it will be impossible to go further.

When the wheel literally rested on the dropouts and there is absolutely nowhere to move it further, but at the same time the bicycle chain is dangling, you will have to remove a couple of links from it. In all likelihood, it was stretched or was not at all the size for a particular model.

Link removal

Conventional speedless bikes are equipped with collapsible chains, one of the links of which has a special lock. But on professional bikes, one-piece chain structures are installed, all links of which are perfectly riveted.

However, disassembling a one-piece bicycle chain is also easy. And this can be done in one of two possible methods:

  • grind pin heads on one of the chain links with sandpaper;
  • or using a universal tool. squeeze.

By the way, it is not for nothing that the pomace is called “universal”. It can not only squeeze out the pin, but also securely fix the newly assembled bicycle chain. After all, the squeeze (well, at least most of them) have a couple of special functional and technological grooves. And one of these grooves the pin is pressed out of the roller, and the other is pressed in. As for the installation place, which is located on the squeeze a little further from the pressing screw, it is intended for riveting the chain pin itself.

Adjusting the chain tension in bicycles at speeds

The tension of the chain on a bike with a parallelogram derailleur (rear) is determined solely by the spring stiffness of the derailleur itself. But the chain, which turned out to be too long, will begin to beat against the frame, since the tensioner will no longer be able to compensate for its slack.

It should be borne in mind that insufficient chain length leads to wear of the main transmission parts, since it significantly complicates their switching. And especially it is necessary to pay attention to this owners of two-suspension bicycles.

When installing a new bike chain on high-speed models, the chain should be shortened. Several links. But to determine how many specific links need to be removed, there are two possible methods:

  • Pull the chain at the front and rear over the largest sprockets. And then pull on the chain, moving the rear derailleur forward and to the limit. It remains to add 2 links, and you get a chain of optimal length.
  • Or the chain needs to be thrown from the front to the largest sprocket, from the back to the smallest. And pull the chain until the rear spreader frame is in the “straight down” position and the derailleur rollers do not form a horizontal line. This is the optimal chain length, the excess must be removed, and the missing must be added.

On two-suspension bicycles, adjust the chain (or rather, adjust its length) more correctly by pressing the pendulum down to the position at which the front star cassette will be as far away from the ratchet as possible. The resulting chain length is measured-noted, and all unnecessary is removed.

How to chain a bike

The chain is one of the most important structural elements for the movement of the bicycle. And its service life depends on the regularity and quality of care. An indicator that something is wrong with the bike chain is crackling and squeaking when moving, as well as slipping it on the ratchet.

In principle, it is normal for the chain to wear out over time. And chain stretching is a visual sign of wear. The fact that the chain has fallen into disrepair can be felt even tactilely. In the normal position, this part sags slightly (by 10 or 12 millimeters), and if you pull it slightly, it will yield another 10-15 mm. True, this method is relevant only for models that do not have high-speed switching or have a planetary type gear.

Slipping like a chain drive defect

Every cyclist is familiar with the problem of chain slippage. The chain will stretch over time and the tension will loosen. In addition, chain stretching leads to quick wear of the bike sprockets. It would seem that what is easier. you just need to remove 2 links. But the “trick” is that you can do this only once, and then you need to change the chain.

How to Put a Bike Chain Back On | Single Speed and Internal Gear Bikes

And further. A new chain on an old ratchet is not ice at all. Slipping will probably remain on small sprockets. So you need to change the ratchet too.

How to tighten a chain on a bike at speeds?

Speed ​​bikes have a more complex chain tensioning principle. There it is regulated by a special spring located on the rear carriage. Accordingly, adjusting the chain tension by simply moving the rear wheel will not work.

The only available way to tighten the chain on a speed bike is by removing the chain links. This procedure is carried out in the same way as described in the paragraph about ordinary. You will also need a special squeeze and a few minutes of time.

How to determine the need for chain tension?

If we talk about ordinary bicycles that do not have a speed switch, then everything is extremely simple. just pull the chain with your finger until it stops and approximately measure the distance of its displacement from the start to the end point. It should be about 10-15 mm. If this indicator is exceeded, then the chain requires tension, but if the offset is 5 mm or less, then it is better to loosen it.

In the case of bicycles that have a gear shifting system (several front and rear sprockets), there are two ways to determine the need for chain tension.

Switch the speeds so that the chain is on the largest sprocket, both in the back and in the front. We take the chain in the area under the chainring and pull it towards the front wheel until the rear derailleur reaches the stop. If, in this case, only 2 links remain in a weakened state, then the chain has optimal tension. Otherwise, its length needs to be adjusted.

We set the speeds so that the chain is pulled over the largest sprocket in the front and the smallest in the back. In this position, the idler roller and tensioner roller should form a straight line perpendicular to the floor. If the offset goes to the left, the chain should be shortened.

Now let’s figure out how to adjust the chain length depending on the type of bike.

When chain adjustments no longer help?

Chain stretching cannot always be eliminated by the trivial removal of unnecessary links. The thing is that under the constant influence of high loads, the links simply begin to deform and stretch.

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So, the normal link length is considered to be 11.9-12 mm. If this figure reaches 12.1-12.6 mm, then the chain begins to “lick” the cassettes, and with a length of 12.9 mm, the chain will have to be changed along with the stars. You can measure the length of the link using the lips to measure the internal dimensions of the caliper.

How to tension a chain on a regular bike?

The first and easiest way is to offset the wheel. It is implemented in the following way:

  • We turn the bike over and put it on the handlebar and harness. You can also use dedicated stands for repair and maintenance.
  • We loosen the bolts or eccentrics with which the wheel is attached to the frame itself.
  • We begin to move the wheel along the landing grooves. If the chain should be loosened, then the wheel should be moved towards the front wheel, if pulled, then vice versa.

After completing the adjustment, it is important to check that the axis of the rear hub is perpendicular to the longitudinal axis of the bike itself, only in this case the wheel can be fixed.

The second way is to remove the extra links. This can be done using the “old-fashioned method”, knocking out the link roller with some thin elongated object. But this approach requires a lot of time and effort, and there is a high probability of simply damaging the chain.

Fixing A Sagging Bike Chain ON A Road / MTB / Hybrid Bike

It is much easier to purchase a special squeeze that will allow you to remove an extra link in a matter of seconds, minimizing the likelihood of damage to the chain. How to do it?

  • We take one link of the chain, put it in a special groove on the squeeze and gently squeeze it with a lock.
  • We twist the arrow knob clockwise, slowly squeezing the roller out of the plates. IMPORTANT! The roller should not be squeezed out completely, because then it will be extremely problematic to return it to its place.
  • After parsing one link, we disassemble the chain and determine the number of extra links, removing them in the same way as described above.
  • We connect the ends of the chain and press the roller using a squeeze.

I would like to note right away that this procedure requires a certain skill and for the first time may require a lot of time and effort.

How to tighten a chain on a bicycle?

Bicycle maintenance is an integral part of its operation, no matter how carefully and carefully you treat your vehicle. This is due to the natural wear and tear of the parts. And today we will talk about how to tighten the chain on a bicycle, because it is this spare part that requires special attention and, with intensive riding, often causes problems.

Improper chain tension can cause problematic gear changes, slippage and faster wear on the bike undercarriage, so it is imperative to monitor its condition, retighten and replace it regularly.

We hope that in this article you have found useful information for yourself on how to tighten the chain on a bicycle, and you can put it into practice if necessary.

Loose chain tension on bicycles without gears

To eliminate the problem that has arisen, you need to understand why it has arisen and tighten the chain. This is done using special wrenches that every cyclist should have with them.

It is much easier to tighten the chain on a regular bike; in the case of a speed bike, it will be more difficult. For successful repair work, when the chain falls off the bike without speeds, you need:

  • turn the bike upside down.
  • If the rear wheel is attached with an eccentric, then you need to loosen it slightly, or not completely unscrew the nuts.
  • Adjust the desired chain slack.
  • Tighten the nuts.
  • Check chain tension and quality of work.

Rear wheel deformation

Perhaps the problem is the deformation of the rear wheel. One of the most unpleasant cyclist problems is the so-called “eight”. “Eight” is the deformation of the wheel, violation of its shape and the inability to perform functions. This problem is eliminated by tightening and loosening the spokes with a special spoke wrench. To do this, the wheel is removed, the affected area is determined and the central spoke of the “figure of eight” is highlighted. Then the needles are pulled through one.

Speed ​​bike problem

For a regular bike, this problem is easy to solve, but what if the chain jumps off on a high-speed bike? Among the most common causes of this problem are the following:

  • deformation of one of the stars. Gear shifting on multi-speed bicycles is carried out using cassettes consisting of several stars. These designs are collapsible and non-collapsible. Replacement of a damaged sprocket is possible only in collapsible structures, if the structure is non-collapsible, its complete replacement is required.
  • Mistakes in the setting of the derailleur can cause the chain to fly off the bike when shifting gears. Gear shifting should be fine-tuned. If the bike owner himself cannot do this, you need to contact a specialist, or carefully study the instructions for setting the bike speed switch. The safety of the cyclist depends on the quality of this function.
  • Stretching the bike chain. This process is associated with long-term use of the chain, the application of high dynamic loads to it, irregular cleaning, due to which the residues of lubricants, mixed with dirt and dust, accumulate on the chain links. In this case, the chain must be shortened or replaced. To shorten the chain, you need to remove several links from it. This is done using a special squeeze tool. This simple tool is a must-have for every cycling enthusiast. With its help, the axle of the link (pin) in the lockless type bicycle chain is pushed out. If there is noticeable stretch on the bike chain, and the service life is long, it will be more advisable to replace it completely. To maintain the chain in good condition, it must be periodically rinsed in kerosene and cleaned.
  • Curvature of individual chain links as a result of which the chain flies off the bike.

What to do if the chain jumps off on a speed bike

A bicycle is a unique means of transportation. It does not pollute the environment, has a positive effect on the health of its owner, and allows you to experience physical activity in the fresh air. A bicycle is the first vehicle that a person receives in his life and for many it remains a favorite vehicle for life. The most common problem faced by every cycling enthusiast is the chain flying off the bike. For what reasons this happens and what needs to be done to fix this problem, we will try to figure it out in this article.

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 sprockets. 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 to the house for better repairs. To eliminate the breakdown, 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 of the speed setting. 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 attach the chain to a speed bike, you need to disconnect it with 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 pushed out 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 bicycle, 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 trips and crossings. Timely diagnostics of your bike is a guarantee of safety.