The chain on the bike is stretched what to do

Switch configured incorrectly

This reason only applies to bicycle vehicles with a gearshift switch. You need to adjust the rear derailleur as fine as possible.

Reasons for the meeting or breakup

One of the main parts of a bicycle is the chain. But even with normal driving, it can fly off or burst. The main reasons for the breakdown:

  • Damage to one of the stars of the transmission system. Speed ​​bike transmission systems are divided into collapsible and non-collapsible. Replacement of the star is possible in a collapsible system. The non-separable transmission system is completely changed, complete. If one sprocket is damaged, driving is possible at speeds that remain serviceable.
  • Incorrect speed setting. The front and rear derailleurs have special bolts that adjust the transmission. If these bolts are set incorrectly, then there is a possibility that when changing gears, the chain will fly off.

What to do if the bike chain falls off?

Why does the chain fall off on a bicycle? There may be several reasons:

  • weak tension (on a bike without gears and high-speed);
  • if the link is bent;
  • when the teeth of a large sprocket are deformed;
  • if the chain is stretched during prolonged use;
  • the speed switch is not set;
  • rear wheel deformed.

In order to understand in more detail what to do if the chain has flown off, we will analyze these reasons in more detail.

Why does the chain jump off on a bicycle?

The bicycle chain often jumps off completely at an unpredictable moment, however, some dynamics of this process is available for analysis.

  • On all types of bicycles, the chain will jump off when it is too long. In theory, the bike should be fitted with the correct chain length by default. But during operation, the chain is stretched. Such a chain is no longer able to hold its position.
  • On high-speed bicycles, the chain will jump off when there are problems in setting the derailleurs or the derailleur foot is so worn out that it is not able to tension the chain with the required force. If the setting is out of order, then the switch sometimes tries to throw the chain to the next gear, and if at this moment the chain does not “lie on the sprocket” completely, then it will come off.
  • Incorrectly constructed system. If you have chosen the wrong components, then such problems are quite predictable. For example, a carriage with a too long axle was bought and as a result, the system protrudes very far from the frame. In this case, the so-called chainline is broken. Due to this skew, the chain flies and wears out quickly.
  • Extreme skiing and untuned shifting system. If you suddenly feel like jumping on a bike, and you haven’t done anything with the transmission, then be prepared to periodically lose the chain on the go. For the correct adaptation of the switching system, you need to add a chain damper to it, remove two of the three stars on the system and shorten the chain.
  • High wear of mechanisms and ingress of dirt / branches. This point is suppressed with point 1 and point 2, but differs in that in this case we are talking about excessive wear. In addition, we will also remember about excessive pollution. the cassette can collect so much debris, grass and branches that the chains will simply have nothing to catch on. Often this point is determined by the slippage of the chain on the cassette. The torsional force is so high that a worn tooth is no longer able to engage the chain roller so tightly.

Adjusting the derailleurs on a new bike

Slips and inaccurate gear changes under normal wear indicate deranged derailleurs. This problem usually occurs with a new bike, or if the chain and sprockets have recently been replaced.

General scheme for adjusting switches:

  • set the optimal cable tension;
  • adjust travel in lower gears;
  • adjustment of the chain stroke according to the higher stars.

For the rear sprocket, you still need to set the correct position of the tensioner, which will compensate for the chain slack.
Bicycle Rear Derailleur Setting:

  • Loosen the screw and remove the drive cable.
  • Set low gears by placing the chain in the 1: 1 position.
  • By turning screw L, the alignment of the guide roller with the star is achieved.
  • Install the cable into the derailleur.
  • Turning the pedals, set the highest gears: the chain on the small sprocket in the back and the largest in the front.
  • Using screw H, match the roller and the active sprocket in the same plane.
  • The correct tensioner position is 5mm from the lowest sprocket in a 1: 1 chain position.

Correct position in the setting of low gears (similar adjustment on the screw H)

Similarly, the front derailleur is adjusted according to the scheme: setting the restrictions on L. adjusting the top gears on H. adjusting the tension of the drive cable. However, first you need to check the coincidence of the switch roller with the plane of the outer stars. Perhaps just setting the rear derailleur will be sufficient. And of course, checking the operation of the transmission, in particular, the chain tension, in practice.

Do chains stretch?

In principle, adjusting the switches will last for a long time. The correct use of the speed system will help to reduce the wear rate, and the timely elimination of negative factors will allow the transmission to last as long as possible.

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 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, bearings of the bushing 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 you will have to replace the rear hub kit anyway.

What to do if components are worn out

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

  • the snake turns or flies;
  • performance of tensioner and derailleurs leaves much to be desired.

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 and start measuring the length. The degree of wear is determined according to the indicators:

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 located 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.

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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 skill in repair work, using a squeeze, try to shorten the chain by a couple of links.

Alternatively, a snake pacifier is 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 cycling, and there is no money to buy new components for the bike yet.

If there is a problem with the rear ratchet

The ratchet can malfunction if there is too much oil used to lubricate the ratchet, or, conversely, if there is no lubricant in this part of the bike. The ratchet bearings may even crumble or begin 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.

Honor should look at it under good lighting before disassembling the ratchet and lubricating it. 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.

Seatpost and saddle

The source of the squeak can be the seatpost or saddle. Unscrew the seat bolts to the seat post and lubricate thoroughly with the thread lock. Then screw it back in. Pull out the seatpost, carefully clean the tube of accumulated sand and dirt. Pay attention to the seat clamp. it must be tight.

If, after the performed manipulations, the bike still continues to creak, contact the bike workshop. And do not forget to tighten the fasteners and lubricate the bike parts from time to time for preventive purposes.!

Roller sounds

There are no bearings in the rear derailleur rollers, but they often whistle when wear clearances increase. They must be lubricated periodically, otherwise the whistle will resume after a while. You can solve the problem by installing rollers with industrial bearings.

It happens that the sounds are emitted by the wheels, or rather the spokes in them. It is possible that you will have to remove each one and lubricate the threads with a special lubricant. If you look at it, then anything in a bicycle can make sounds. An elementary constriction of all fasteners of the bicycle and periodic maintenance of all nodes helps to prevent or remove squeak.

Bicycle creaks

A squeak in a bicycle is a clear sign that something is wrong with your two-wheeled friend. some components rub against each other, causing them to wear out. This is easy to learn. The main causes of strange noises are improperly tightened parts, lack of lubrication and dirt. At the same time, incorrect tightening does not mean that it is weak, in some cases it can be overtightened, and then, instead of free play, some rotating part will do it with effort. excessive friction will generate a whistle.

In case of insufficient “tightening”, gradually during operation, the part looses even more, the thread gets lost, the gap increases, dust gets into it and, working as an abrasive, causes additional damage, creating even more noise. But the main thing is that if the part is not firmly fixed, then it can fall off along the way, provoking a fall and injury.

Another question is how to determine what exactly the problem is, and what part of the bike makes disturbing sounds. After all, the frame is large misinforms the rider, sending the creak to a completely different place. What to do? Let’s try to figure it out!


The carriage very often causes squeaks during driving, since it takes on the main load when transferring mechanical energy to the wheel.

But first of all, you need to understand that the cause of the sounds is not in the pedals: remove them, clean them, lubricate them. If the sound does not disappear, proceed further. The carriage is removed with a specialized tool. It should be inspected for damage, then cleaned and lubricated. Also check if the connecting rods are properly tightened.

The chain creaks and crunches

The chain can also make different sounds. First, it can hit the frame feather, but that’s okay. You can put on a special pen protection on the pen or simply wrap it with electrical tape.

The chain can also crackle. Of course, our old friend sand tried again. Clean the front and rear sprockets, the rear derailleur sprockets, the chain itself. Lubricate it. There should be enough lubricant. if there is too much, dirt (and all the same sand!) Will stick to it, which will wear out your transmission.

Rarely, the chain can make a clicking sound from time to time. Be careful and careful: it signals that it will break soon. This is due to the fact that on one link one of the cheeks slipped off the pin. Use a squeeze to remove the broken link and continue to ride. Also, clicks can emit spokes, since they have lost their rigidity, weakened. They need to be pulled, and it is better to entrust this business to the professionals in the workshop.

In the event that you examined all the rotating, moving components, but did not find the cause of the squeak, carefully inspect the frame itself, perhaps there is a microcrack somewhere. In this case, we recommend contacting the service: an experienced master will tell you how “dangerous” it is and how you can “cure” it.


When it comes to rim brakes, the main reason for a squeak can be the condition of the rim. wear and dirt. If no signs of wear are found, you just need to clean the rim with a special cleaner or alcohol.

Disc brakes can squeak due to the stiffness of the material they are made from. This is especially true in wet weather. The disc brake can also produce such shuffling sounds. This means that the disc itself is bent. It must be removed and, placing it on a flat, hard surface (better if it is a metal plate), straighten it by gentle tapping with a hammer. If things are really bad, then replace.

Steering column

If you can’t figure out what exactly is squeaking in your bike, start by looking at the steering column. It is necessary to disassemble the steering column, clean the bearings from dirt, lubricate them. Then tighten the bolts properly. If the problem was in the steering column, the squeak should be gone.

Squeaky pedals

Also, the source of the squeak can often be the carriage, cranks and pedals. after all, it is to them that the cyclist applies the main effort when riding.

The reason for the squeak is the presence of dirt and lack of lubrication. Of course, the best solution to the problem is to iterate over the entire block, but first try to deal with only the pedals. If you have cleaned and lubricated them, but the creak has not disappeared, then you should go deeper: clean the connecting rods and the carriage.

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The noise in the connecting rods is eliminated by cleaning the seats with their subsequent lubrication. If this is not possible, try tightening the bolts that secure them: this sometimes helps. If you figured out the pedals and cranks, and the noise and rattle did not disappear. well, you have to grab the carriage.

Go over it, clean it of dirt (the solvent will help you!) And lubricate it. Of course, if the balls in the bearings are not what they used to be, the parts are easier to replace. Apply sufficient, not excessive force when assembling!

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.

Solving problems with rear ratchet

The rear ratchet could have affected the appearance of pedaling:

  • For this, the rear wheel is disassembled and the ratchet is inspected.
  • If it is overfilled with old oil or it is absent, corrosion has appeared, then the structure must be cleaned.
  • After that, dry and grease everything with a thick silicone-based oil.
  • If the ratchet is deformed or broken, replace it with a new one.

What to do to avoid pedaling?

To reduce the possibility of the appearance of scrolling of the connecting rod-pedal assembly, several rules must be observed.

Usually this breakdown appears due to poor bike care:

  • Prompt attention to any changes in bike performance.
  • Several times a season or after each major ride, you need to disassemble and inspect all parts of the bike to determine wear.
  • If any parts are contaminated with dust, old oil or debris, they need to be cleaned.
  • It is recommended to check the parts for the presence of oil.
  • If any corrosion, deformation or destruction is found, an urgent replacement of the part is required.

The service rules also include the peculiarities of bicycle storage. It is best to leave it indoors without a constant and abrupt change in climate, temperature, and to avoid high levels of moisture.

If the bike is stored unattended for a long time, you need to remove the chain (avoid stretching) and place it in a container with kerosene. You also need to loosen the brake system and remove, if possible, all electrical appliances.

The problem of scrolling the pedals of a bicycle most often occurs due to carelessness or careless handling of the bicycle. If a breakdown occurs, it is necessary to disassemble the parts that could cause this.


If there is a problem with the rear ratchet

The ratchet can malfunction if there is too much oil used to lubricate the ratchet, or, conversely, if there is no lubricant in this part of the bike. The ratchet bearings may even crumble or begin 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.

Honor should look at it under good lighting before disassembling the ratchet and lubricating it. 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.

Why pedals on a bicycle?

Many cyclists face this problem. The mechanism that makes the bike move is called the crank-pedal assembly.

This could be influenced by several factors:

chain, bike, stretched
  • The chain of the bike was very stretched and subsequently deformed and now does not transfer movement to the rear sprockets. As a result, there is no movement, and the pedals move to idle.
  • The sprocket is worn so much that it does not transfer inertia to the wheel.
  • Critical damage to the rear wheel hub.

Damage to sprocket cranks

As for the reasons why the cranks of the sprockets are damaged, this is most often caused by the implementation of excessive pedal pressure during driving. Notches on them can “lick” naturally as a result of friction. The end of the life of the sprockets is bound to cause problems with the cranking of the pedals.

In some cases, the trouble can be eliminated by flushing the sprockets from accumulations of old oil, debris and adhering dirt. To remove these impurities, it is enough to carefully wipe the parts with a piece of material moistened with kerosene.

If the problem is serious and several teeth are missing on the sprockets, you need to dismantle the functional unit, disassemble it and, if possible, replace the damaged elements with intact ones. Naturally, the most reasonable solution in such a situation is to install a new set of stars. However, this option requires significant cash costs.

Causes of chain problems

Even the simplest bicycle contains 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 sprockets. 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 may 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;
  • 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.

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

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

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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 must be replaced with new ones with suitable dimensions. Such a careful approach allows you to quickly and efficiently change the necessary system parts and ensure the bike’s performance under optimal load.

An extended chain can damage the sprockets and therefore all system components must be replaced. If the problem is detected early, changing the sprockets can be avoided, but it is best to carefully inspect the teeth and determine if there is any damage. You also need to remove the chain from the bike and measure its length. If this parameter is more than 308 mm, then the part should be replaced. Otherwise, the chain will slip on the bike under any load.

With large stretching of the links, the probability of damage to small and medium-sized 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 allows you to maximize 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 sprockets. In this case, the features and characteristics of the technique should be taken into account.

What to do if the chain fell off the bike

Imagine this situation. you are riding, drove quite far from your home and then a “bryms”, a bicycle chain flies off. The problem is not the worst, but if you have never put the chain back in place before, difficulties may arise. It is especially unpleasant that cyclists usually do not have any tools with them.

This article is planned as a quick emergency guide that can be used in the field. And also, below we post a video so that you can quickly solve this problem.

When to Replace a Chain on a Bicycle

First, be prepared to get your hands dirty with oil. As they write on modern memes: “You can’t just take and put the chain in place without getting your hands dirty”.

Secondly, problems will begin not just when the chain has fallen off the bike, but when the chain gets stuck between the system and the frame. This is the worst case. But let’s take everything in order.

First, let’s figure out why the bike chain flies at all.?

There are several reasons:

  • Strong shaking while driving
  • Too stretched chain
  • The chain was recently oiled
  • Switch incorrectly configured
  • One of the links in the chain is biting, not turning.
  • Sprocket bent or cassette damaged

Most often we deal with a combination of factors at once.

The most unpleasant situation when the chain falls into the space between the frame and the star occurs if at one of the moments the chain is “in an advantageous” position for this. All of the factors described may play a role.

The principle of a light bulb in the mouth works here. it falls in one direction, but does not get back. But, unlike a light bulb, the situation can be corrected without the help of a traumatologist.

Depending on the type of bike you are using, there are two different options depending on the type of transmission.

So, what to do if the chain has fallen off?

  • If the bike is fast, and the chain does not fall between the system and the frame, then simply place your hands on the chain over the desired sprocket, bending the derailleur foot. Step the pedals and enjoy the ride.
  • If the bike has one speed and the chain is tensioned by moving the rear wheel in the fork, then the situation is a little more complicated. We turn the bike over and scroll the carriage with the system. We are trying to hook the loose chain with the tooth of the chainring. If it starts to engage, then gently help the chain into place with our hands and do not forget to rotate the connecting rods, simultaneously with this action. As a help, you can use a screwdriver or an ordinary stick.
  • If the chain falls into the space between the frame and the system, then you are in the most unpleasant situation. You need to try to catch the position in which the chain fell into this space. Of course, if you have a squeeze or a crank puller with you, then the situation can be simplified. But usually they are not. Therefore, you need to try to push the chain back. The chain itself needs to be rotated in different planes and look for an advantageous angle. Sometimes you have to help the chain to get out by hooking it with a star and turning it through the frame. It is best not to do this because you will notch the aluminum frame and it may crack at this point. This option can only be used if the situation is completely hopeless.

Try to help yourself with various objects. sticks, screwdrivers, etc. The star can be slightly (1-2 mm) bent, using a lever (just do not overdo it, otherwise the whole system will need to be changed).

  • Similarly, the situation in the hitting of the chain between the cassette and the spokes is solved (if suddenly the protection is not installed).

Remember! The most important thing is to have patience. The situation seems insoluble only at first glance. After a long search for an advantageous position, the chain will surely jump out of this dead position, and you can throw it back on. Above all, do not make it worse J Do not use excessive force and do everything carefully.

Write in the comments what methods of troubleshooting such a malfunction you use!