How to Remove the Chain From a Mountain Bike

How to remove the chain from the bike yourself?

The chain is the main component of the bike’s drivetrain. It transmits torque to the rear wheel through the drive sprockets. This is how the bike is set in motion. As a result of the loads that the chain is subjected to during operation, it wears out.

On bicycles with a single speed, the chain usually lasts the entire life, as it moves smoothly and straight over the sprockets. Removing this part on a high-speed bike is required much more often due to the fact that there is no right angle between the front and rear sprockets. As a result, the loads on the chain mechanism increase several times, which leads to wear.

Malfunction symptoms

First of all, you need to pay attention to the chains on multi-speed bicycles. Although the operating time of this element is formed from the mileage traveled, the value is very approximate, since the real time of use is determined by the nature of the ride, speed mode, road quality.

Inaccurate gear shifting and a strange clang are the first symptoms that the chain is out of order. To find out for sure, you can use the following method.

The chain is folded back from the largest sprocket. If three or more teeth remain free, then you need to urgently remove the chain from the bike and replace it. The same method works for singlespeeds.

In addition to the method described above, there is another one. measuring the relative elongation:

  • 304.8mm Ideal Chain Length
  • 306.5. 307.5. acceptable wear and tear, you can still ride;
  • 308 mm. heavy wear of chains and sprockets;
  • 308 mm or more. the transmission unit is badly damaged, the bicycle chain needs to be urgently replaced.

The image below clearly shows the difference in length between a worn chain (top) and a newer one (bottom):

Cycle chain with and without lock

Removing a speed bike chain is no more difficult than removing it from a regular two-wheeled “friend”, because it all depends on whether the chain is equipped with a lock or not. If a part with a lock is installed on the bike, then it will not be difficult to remove it for replacement or cleaning. If the chain is not too dirty, the link with the lock can be found almost instantly. If the knot was not found, then the part is either solid, or it needs to be thoroughly cleaned.

Lockable bike chains are equipped with a special clamping mechanism. As for convenience, it is much easier to remove a chain with a lock from a bicycle than a structural element without a lock. But it’s fair to say that the clamp can loosen, and the link itself can be disengaged. At the same time, there is no such problem with solid bike chains. if the chain is broken, then the whole problem is solely due to its quality.

Removing with a lock from a bicycle

The process of mounting and dismounting a part is the same for single-speed and multi-speed bicycles. Before removing the bike chain, you need to find the link with the lock. There is often the name of the manufacturer and there is a special clamp that holds the adjacent links.

Locks from different firms are not the same, but the process itself has minimal differences. It is necessary to connect adjacent axles and remove the clamp. It is possible to pry the lock with a slotted screwdriver or some other sharp object. At the same time, try not to damage or lose the clip, otherwise you will not be able to assemble the chain again.

Removing the solid chain

Removing the bike chain without a lock is much more difficult. For this, a special device is useful. squeezing the chain.

remove, chain, mountain, bike

Of course, you can do without it, for example, put the pin on the table and gently tap it. However, after this operation it will be incredibly difficult to shove it back.

How to shoot a solid bike chain:

  • Any link is selected, installed in the puller so that the axis is opposite the release axis.
  • Then, slowly turning the screw, squeeze out the pin. The point here is not to extrude the axis completely.

Thus, not only can the chain be removed from the high-speed bike, but also the normal one can be repaired.

Correction of defects

The most common wear is sagging. Above, the critical values ​​of the elongation of the bicycle chain were analyzed, at which its further operation is extremely undesirable. But it is not necessary to throw out the chain at the slightest wear, you can try to repair it. Under prolonged loads, the axes of the chain become loose, resulting in longitudinal and lateral deformations. It is impossible to get rid of the last type of deformation, but you can fight with the longitudinal.

In order to get rid of the longitudinal expansion, it is enough to remove the extra links. They must be removed so that the chain moves along the large sprocket without tension. With the help of a squeeze, extra links are removed, and the extra axle shafts are completely removed. It is important not to overdo it and not pull out too much.

If you need to go immediately, and there is no time to repair, you can use the so-called pacifiers. This is the name of the devices that prevent the chain from slipping off when driving.

Installing the chain

Before starting the installation, you should make sure that it fits the bike in length and width. If the chain is too wide or too narrow, it will not work. In the case of length, everything is much simpler: just remove the extra links.

In order to install the chain on a speed bike, you need to set the speed switches to the highest position, and then lock them. When installing the bike chain, you must correctly put it on the tensioner rollers. The chain should go around the lower roller on the left and the upper on the right. Then the two extreme links are combined and the pin is set. After the chain is installed, the axle is inserted into the squeeze, fixed with a screw and the pin pressed in. If the latter is aligned with the edges of the chain, then everything is done correctly.

After installation, you need to check the course of the chain. It should not have sagging, pedal scrolling should be free. If the stroke of the pedals is tight or the chain sags, then using the same squeeze, using the second seat, we adjust the second axle.

Practical advice

There are times when it is urgently required to remove the chain from the bike, but the squeeze was not at hand. In this case, you can use the old method. riveting.

When removing the chain again, different links should be used, as wringing the pins loosens them.

If you regularly remove and install a solid bike chain, you should put a lock on it. This will greatly facilitate the process.

How to remove a chain from a bike. detailed recommendations

a bicycle chain in perfect condition guarantees an adequate response to the actions of the cyclist from the side of the entire mechanism during movement. When buying a new vehicle, there is no need to buy a new chain separately and install it. However, in the future, you will still have to learn how to remove the chain from the bike for maintenance or replacement.

When to change your bike chain?

A good lubrication for the bike chain can significantly increase the life of the entire system responsible for movement. At the same time, it is necessary to be able to notice the moments when it begins to need maintenance or repair.

Excessive wear on the bike chain not only causes permanent discomfort while riding, but also causes active deformation of the sprockets. If you leave a worn-out chain unattended for a long time, this is guaranteed to lead to the need to replace a whole set of expensive mechanisms.

In order to assess its condition as objectively as possible, it is necessary to look not at the mileage, but first of all to measure the length of all its links. Normal chain length is approximately 305 mm. The reason for its replacement is its stretching up to 308 mm or more.

How to deal with chain stretching?

Sagging is a common problem with bike chains. The reason for the development of this process is the gradual wear of the links. over, it is almost impossible to prevent the wear of individual chain elements. The problem can be eliminated only by removing excess links as stretching.

To correctly perform the required actions, you must:

  • Decide how to remove the chain from the bike by first disconnecting the rear wheel.
  • Disconnect the chain with pliers.
  • Determine the number of unnecessary links.
  • Remove unnecessary elements.
  • Connect the links, install the chain, check its mobility and performance.

How to remove a chain from a bicycle for replacement?

When an old chain is physically and morally obsolete, not satisfying the bicycle owner with the operating conditions, it must be urgently replaced. As a replacement, a chain with the same number of links should be selected. However, its length should be slightly less.

How to remove the chain from the bike correctly? To do this, you need to use a special tool. squeeze. With the squeeze in front of any of the rollers, tighten the screw in such a way that this will push the pin out. Next, loosen the tool, and then remove. In a similar way, using a squeeze, the chain is removed for regular scheduled cleaning.

Experienced cyclists often use special locks for quick maintenance, removal and cleaning of old chains. The use of this device makes it possible to instantly remove it for replacement. However, some bike owners have biases about the effectiveness and reliability of the lock. Indeed, if it is present, the risk of a sudden break in the circuit increases. It is not known for certain how often chains break when there is a lock, but still, the mechanism looks more reliable without it.

How to chain a bike?

Chain tension is fairly easy on standard road bikes. It is enough to pull it back towards the fork. The main thing. perform such a manipulation carefully so as not to overdo it, performing too tight a tension.

However, both tightly and loosely tensioned chain can create some discomfort while driving. So, when trying to figure out how to tension the chain on a bicycle, it is important to stop in time so that it is in a state of medium tension.

Bicycle chain tensioners

An effective and useful accessory can be a special bicycle chain tensioner, the use of which allows you to maintain the required tension while riding. This accessory is used mainly by fans of extreme, aggressive driving.

Chain tensioners are usually installed on single-speed bicycle models. Such accessories consist of one or more rollers, a lever and a spring. Tensioners work on the principle of a systematic retraction of the bicycle chain in the required direction, which creates the required tension. over, the presence of a tensioner prevents the chain from falling from the drive sprocket located on the bushing.

Experienced cyclists are advised to always have several chains in stock. Each of them should be operated with a knurling no more than 600 km. Then the bike chain is replaced. A new, shortest one is put in its place. As a result, the life of not only all available chains is significantly extended, but also the transmission of a two-wheeled vehicle.

How to remove the chain from the bike? How to remove a bicycle chain?

The bicycle chain is one of the key transmission units of any bike, which directly transfers the rotational-translational energy of the rider’s legs to the rear wheel, which sets the entire unit in motion. In this case, the chain is subjected to the most intense work and various external influences of a destructive nature, which means that it needs careful care, prevention and ensuring the initial working condition.

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Depending on the conditions of use of the bike, if it happens occasionally in favorable sunny weather, you can limit yourself to simply cleaning and lubricating the chain without removing it. But when riding happens regularly with extreme elements, including rough terrain, landscapes, rainy, windy weather, etc., regular wear and tear occurs and the need to remove the chain from the node for thorough washing from dirt in special solutions, lubrication, possibly a complete replacement or in separate cases. adjusting its length.

You need to know that bicycle chains are made only taking into account the compatibility of various transmissions and come with or without a connecting lock and are accordingly called lock or clamping. A separate global manufacturer tries to develop its own sound technologies, proprietary developments in connecting mechanisms and implements it in each model, adhering to certain principles.

Chains with a lock are considered more practical, especially in assembly and disassembly, which do not require much effort. Clamping devices represent a monolithic structure, which means they are more reliable, but they suggest the presence of a special tool. squeeze, the handling of which requires experience and work skills, which is hardly suitable for beginners.

How to remove the lock from the bike chain?

Carefully inspect all the links of the chain, usually the lock has a prominent shape with larger holes for pins, or in the form of an elongated horseshoe, an elongated oval, and similar nuances. You will need to loosen the chain in the area of ​​the lock, this method is also great for installation. For convenience, you can use a wire or make a bracket out of it and fix it on the links on both sides of the lock so that it sags down, somewhere two or three links from the connection, and more, as it is convenient for you. To keep the chains in a slack state, special holders are sold, you can use them. Further, if you cannot remove / fasten the lock manually, then use ordinary pliers and slide the pins (axles, pins) on each half of the lock cheeks. the circuit will open. There are special pliers on sale in the form of a movable trident for opening and closing locks, which can be purchased, it will be easy to work with them.

How to remove a chain without a lock?

First of all, you need to choose a link that will be sorted out. If this happens for the first time, it doesn’t matter what it will be, if possible, look for the link with which the chain was connected at the manufacturer’s plant (as a rule, it stands out). However, if this has already happened before, it is very important to choose a new one, and not the link that was dismantled, otherwise the probability of rupture increases.

Next, we arm ourselves with squeeze. It is a special tool like a miniature press with the same extrusion wedge. We install the selected link in the squeeze, carefully fix and squeeze out the axle using the rotating handle of the press. It is strictly not recommended to extrude the axle to the end, if you do not plan to replace it, otherwise it will be very problematic to insert it into its original place. It should remain in the opening on the back of the link cheek, so that there is room in the middle. The chain is removed. For the installation process, everything happens the same, only in reverse order.

How to remove a chain from a bicycle without squeezing?

Dismantling the chain without a puller is considered vandal and such a bicycle chain will be loosened at the point of separation by improvised means. But how to do it. we will tell you in this article.

  • We start by loosening the tension by removing the chain from the cranks and placing the bike on its side (which is no longer good, you can damage the paint).
  • We spread the chain so that you can knock out the pin. It can be a bushing of a small diameter, a nut, two objects lying at a short distance from each other…. Anything…. We turn on imagination and ingenuity.
  • We take a hammer and a tip slightly smaller in diameter than the pin. and gradually knock it out. We knock out not completely so that it does not fall out. This will make it easier to put the chain back together.

But with the modest cost of the simplest, one-time squeeze, it is better to use it. With an inexpensive tool, we handle it carefully so as not to bend the squeezing pin on the squeeze. So you can remove the chain more than once.

Removing the chain from a bike

Two-wheeled vehicle repair skills will help riders deal with difficult issues quickly and efficiently. The most frequently asked question is how to remove the chain from the bicycle. At any time, unforeseen situations or the need for maintenance of equipment may arise and therefore several recommendations will help.

When is it necessary?

This procedure may be needed at the following points:

  • Replacing an old part with a new one;
  • Installation of new speed switches on the transport;
  • To make the chain shorter;
  • To clean the element.

Work process

Removing an element with a lock does not take much time and effort. Today there are several varieties of this bicycle chain device, but the principle of their opening is similar. It is necessary to close the axles and remove the cover. For convenience, you can use pliers, it is also good if you have a pliers for opening at hand. Thus, the whole procedure does not take much time and you can quickly remove the malfunction, change the part or remove the chain from the bike.

If there is no lock, then you need to make some effort. For work, you need a special squeeze. It is a tool with which it is very convenient and easy to extrude a pin. To work, you must position the chain link so that the release axle is directly opposite the pin. Then you need to twist the handle and squeeze out the pin itself. It is very important not to allow it to pop out, otherwise it will be very difficult to insert the pin into place correctly. Further, the bicycle chain can be replaced or repaired.

There are also some points to consider when working. For example, there was repeated removal of the same bicycle chain, then the next time it is necessary to open another link and segment, because after this process it loosens a little. Also, some models of pomace may have two seats and you need to fasten the link carefully, correctly and carefully.

Design and its features

A bicycle chain is a fairly simple metal structure that is designed to transfer the drivetrain from the drive sprocket to the driven one. Constituent elements:

  • Outer plate;
  • Inner plate;
  • Pin (roller);
  • Roller;
  • Sleeve.

The main difference between the different types is the distance between the rollers and the width. In some modes of transport, this part may be part of the gearshift system. This detail is important and requires special attention.

A bicycle chain requires regular maintenance, cleaning and repair to function properly. Regular lubrication and flushing will ensure that the equipment works well, and every few thousand kilometers the chain must be replaced with a new one. There is also a certain indicator of the degree of elongation (0.5%), that is, pores when a new part is needed. Without special measuring tools, you can determine the degree of wear as follows: you need to install the element on the largest sprocket (leading) and pull it off, moving it away from the teeth. If more than 4 teeth fit into the resulting space, then the bicycle part must be urgently replaced.

It happens that you need to remove the bicycle chain. for example, to clean it, replace it or adjust the length (the latter is done if your new cassette has a different number of teeth, and you need to change the chain length accordingly by adding or removing a certain number of links).

How to remove a chain with a lock

Examine the chain: if you find a link that is different from all the others, then you are in luck. you have a chain with a lock. In order to separate it, slide the pins (pins, axles) on each half-link (cheek). The circuit will open. The whole operation will take just a minute. You do not need any special equipment: if you suddenly cannot move the pins by hand, use the pliers. Assembly is also done without any tricks, in reverse order.

How to remove a chain without a lock

If you have a chain without a lock, then you need a special tool. a squeeze for the chain. It is inexpensive, it takes up little space, so we recommend that you always carry it with you, along with a set of hexagons and a repair kit for cameras. Anything can happen on the road. if the chain suddenly breaks, you can easily remove the damaged links using a squeeze and reconnect the chain.

How to remove a chain without squeezing? And is it worth doing?

How to remove a chain without squeezing is a burning question. But no matter how often it is asked, it is better to remember one life rule. For good repair and maintenance, it is better to use a specialized tool! In this case, it is the squeezing of the chain.

There are two types of pomace, most of them with two seats. One of them is for assembling and disassembling the chain, the second is for adjusting the position of the axle in the bushing of the chain link. If your squeeze is exactly this, with two seats, then insert the chain link so that it is on the side closest to the adjusting screw. If you put the chain in the wrong place, you can accidentally break the partitions between the squeeze seats during operation or crush the link cheeks.

Suppose the chain is laid correctly. Now gently rotate the handle. The effort may have to be significant, so try to work carefully so that the link in the squeeze does not skew, otherwise it can be damaged. Make sure the tip of the squeeze is pressing exactly on the pin. You do not need to turn the screw quickly, you should stop at the moment when the pin is squeezed out of the entire link, but remains on the far cheek. If you squeeze it out completely, then, believe me, it will be very difficult for you to insert it back. Also, be careful not to inadvertently knock the pin out of the cheek, as it can roll away in an unknown direction and get lost.

When assembling, you will not need anything other than the same squeeze. I remind you again: be careful, do not get carried away so as not to squeeze the pin out of the link.

Two important notes:

  • If your chain is equipped with a lock, then you should not disassemble it with a squeeze.
  • If you have to disassemble the same chain many times, then each new time choose a new link: if you squeeze the same pin over and over again, this will worsen the strength of the chain.

Circuit break signals

Owners of multi-speed bicycles should be especially careful. The main signals for chain damage are incorrect gear shifting and suspicious sounds (other than loss of lubricant). To determine if the chain is faulty, it bends back from the largest sprocket to see the number of loose teeth. If the chain is free from 3 teeth, it is urgent to change it. If 2 teeth come off, this indicates imminent wear, but it is still allowed to ride. Similarly, it is determined how loose the chain is, and in single-speed bicycles.

The second method of the degree of wear is detected by measuring the chain length:

In all the above cases, the chain is completely removed.

Required inventory

The chain is dismantled using:

  • pliers;
  • devices that squeeze the chain;
  • a set of keys;
  • screwdrivers.

Difference between key chain and solid

The locking chain has a clamping device. This chain can be easily disengaged and put back on by simply disengaging the lock. To find the detachable link, the chain is carefully examined from each side. If the chain is clean, the lock can be found quickly. It is protected by a tick. a link lock. The lock link has production engraving. The lock cannot be found in two cases:

  • if the mechanism is very dirty;
  • the chain has no lock (solid).

The continuous mechanism is somewhat more difficult to separate. Its links look identical and are similarly linked to each other. It is quite problematic to clean a continuous chain with a solvent. If it is enough to simply remove the locking chain, put it in a container and fill it with kerosene; then the solid mechanism remains hanging on the bike frame, even if it is removed from the stars.

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Despite the fact that the locking mechanism is more convenient than a solid chain, there is a possibility of loosening the fastening. The tick has a habit of flying off, causing the link to disengage. As for the solid mechanism, the weak points given here are excluded, and a rush is possible only if the quality of the chain is low.

How to open the lock and squeeze the link axle

The lock is opened with a screwdriver or knitting needle. Use the selected tool to carefully pry off the pliers. Carefully work should be done to avoid damage or loss of the tick. Without a tick, the chain will not fix later. The link is then completely disengaged. Now you can remove, clean or change the chain.

To disconnect the continuous mechanism, you will need a special tool. a squeeze. Using it, the analysis is carried out without any damage. Although the manipulations are simple, the work should not be rushed. The process is carried out in several stages:

  • Choosing a link for parsing.
  • Inserting the chain into the press-out position along with pressing the link axle (pin).
  • Tightening the screw with the handle and pulling out the axle. Extrusion should be directed towards the squeeze screw (towards you).

Since the pin is not easy to reattach, it is not necessary to remove it completely. Due to the fact that squeezing contributes to the loosening of the axle, the re-release must be done on another link.

The axle is pressed into the link in an inverted manner. The adjacent links are connected to each other and the pin is pressed with a screw.

Changing the bike chain

Chain slack is considered the most common type of chain wear. In this case, there is a relative increase in the original length of the mechanism. There is no need to rush to change the chain, the mechanism may need to be repaired. Since long-term loads entail loosening of the axle, lateral and longitudinal expansions are formed. Elimination of lateral expansion is impossible, while longitudinal expansion is corrected.

The elimination of unnecessary links is carried out in the smooth passage of the chain along the largest star (without interference). Extra links are removed by squeezing. The axle shafts of the spare parts to be removed must be pulled out to the end. It is important not to make a mistake. it is unacceptable to remove an excessive number of links.

If it is necessary to ride a bicycle with a stretched mechanism, it is strongly recommended to install chain dampers. clamps that prevent the chain from falling off while riding. Adaptations are:

  • frame (rollerless);
  • roller with two clamps;
  • wide roller.

Of course, you can resort to pacifiers. It is undesirable to only tighten with the replacement of the chain.

Removing the chain, which has a special lock

Removing such chains is easy and simple, it takes 1-2 minutes. You just open the lock and the chain is removed.

But our person is not looking for easy ways, and not every bicycle lover agrees to spend money on such tools, so all this can be done with ordinary pliers or round-nose pliers with narrow noses.

If the lock is tight and does not lend itself just like that, you can try to remove it using an old cable from the brakes or gear shifting, strong rope or wire. To do this, a wire is threaded between the locking links, as shown in the figure. With a pair of pliers we grab both edges and pull sharply in opposite edges, unclenching the lock.

Removing the chain without a lock using a chain release

Here, everything is not as simple as in the previous case, although the same is not very difficult.

In this case, a special tool called chain squeezing (cycling) helps. They are available as a stand-alone or as a bicycle multitool, which is much more convenient when traveling or at home.

We will now consider how to use the chain squeeze.

First, select the link that we will disassemble. If the chain is being disassembled for the first time, it can be any link, but it is better to look for the link with which the chain was assembled at the factory when assembling the bicycle. Usually this pin stands out from the rest. If the chain has already been disassembled in this way, then it is better to choose a different link, and not what was the last time. This is due to the fact that the squeeze loosens the pin a little.

Next, the selected link must be put into the squeeze so that the pin is right in front of the release axle.

Now we just slowly turn the handle, squeezing out the pin. And here’s the most important thing: constantly check that the pin does not pop out completely. If it pops out, it is very difficult to insert it back (even using all the possibilities of the great and powerful Russian language).

Another small point: be careful not to lose the video from the link in which the pin was squeezed out. Otherwise, there will be problems later.

After washing and lubricating, the chain is assembled in the reverse order. You connect the links, insert the pin, not forgetting about the roller, and press the pin back with the squeeze screw.

Is it possible to remove the bike chain without squeezing?

Sure you may. Nothing is possible for our person. In early childhood, when all these devices and tools were not available, in order to remove the chain or link from the bicycle chain, we used an ordinary hammer and a thin bolt or nail.

The chain was placed on a nut or so that the axle was in a narrow gap between the stones on the curb (so that it had a place to squeeze out), a nail was placed against the axle and, slowly tapping on it with a hammer or just another stone, knocked out the pin. The main thing was not to knock out the pin completely. The chain was also assembled back.

Soviet single-speed chains have withstood this treatment, but are unlikely to withstand modern multi-speed chains. They are too gentle for that. You can simply bend the chain link. So you better use a chain wringer for all this work.

Bicycle chain removal video without squeezing

Any vehicle needs maintenance. Bicycles are not exempt. Their key element in the transmission unit is the chain. Speed ​​bikes have a lot of finickyness to function properly. The frequency of chain replacement or maintenance is largely determined by the riding style. For example, trial cycling lovers do this while riding. When and how to change the chain on a speed bike?

Bicycle chains come in two types: lock and solid. Disconnecting the lock variation is not difficult. It is convenient to do this with a regular thread (wire), threading it into adjacent links (before and in front of the lock) and tightening the loop. The main thing is to avoid damage to the lock and not lose it.

Opening a continuous chain is possible only with a special squeeze, although the procedure itself also cannot be classified as difficult tasks:

  • It will be necessary to install the chain in the position of pressing-pressing the axle.
  • Tightening the pin pull-out screw.

Axial pressing is characterized by the opposite sequence: connecting the links and pressing the pin by means of a screw.

What tools are important to have to replace the chain:

  • The key used to remove the rear wheel.
  • Pliers to hold segments and pins.
  • Squeeze. As noted above, this device is used to press out and press in the pins.

Cyclists who do not have sufficient experience in such matters are advised to memorize the general diagram, which reflects the location of the chain on the system, cassette, switches. Then the procedure for its subsequent installation will not cause difficulties.

As soon as all the nuances are fixed in memory (or on paper), you can proceed to further steps:

  • Cleaning links from dirt accumulations. If this is not done, dirt will be a significant obstacle to the next steps.
  • Removing the rear wheel. The absence of this detail simplifies all actions, although experienced craftsmen safely skip this stage. In fact, it does not apply to mandatory measures.
  • Extrusion of the pin present in all links (the metal cylinder that closes the link). This is where the pomace applies.
  • Disconnecting one link.
  • Withdrawing extreme links from the switch system.

At this point, the removal of the chain (worn out or requiring cleaning) can be considered complete. The procedure itself is quite easy if you have a tool and basic knowledge. Accuracy of execution and the absence of forceful actions during the pressing process are very important.

With bicycles that have one gear (singlespeeds), everything is limited to a chain canopy on a part of a star configuration and a latching snap-in or pressing in a pin. The design of high-speed bike bikes suggests some difficulties in this issue.

They can be designated by the following points:

  • Locking derailleurs on small transmission stars.
  • Next, a chain is put on the teeth of the stars. In this case, it is important to take into account the location of the rollers involved in its tension.
  • Then the chain links are aligned.
  • The chain is clamped and the axle is pressed in or the lock is closed.

At the final stage, the move is checked. For this purpose, the pedals are rotated. Incorrect installation is characterized by sagging of the installed element and difficult twisting. If this is not observed, the installation of the chain is done according to all the rules.

In what cases, besides wear, the chain is removed:

  • For deep cleaning when it is necessary to remove lubricant and accumulated abrasive.
  • To replace damaged links.

A failed chain stretches, its links shift, harming the sprockets, which negatively affects the switches. It is difficult to visually determine the degree of wear.

Therefore, they use a simple measurement, that is, you need to measure twenty-four links, or rather their total length:

  • With a size of 30.5 cm, we can talk about the normal state of the chain.
  • An indicator of 30.65-30.75 cm indicates the need for replacement.

By the way, cutting the stretched chain does not solve the problem. Stretching is characterized by a uniform distribution. In this case, damage to the stars cannot be avoided. As you know, “star” parts cannot be repaired. It is cheaper to change the chain than to replace more expensive components.

A video plot will tell you how to replace a chain on a bicycle

Bike chain

The working resource of the singlespeed chain mechanism is designed for the entire life of the bike. The bicycle chain runs smoothly, without deviating. The situation is somewhat more complicated with the bikes, designed for several speeds. The load on the chain mechanism is greater in relation to parallel gears because the bike chain is angled with respect to the bike frame. Compared to parallel transmission, the impact on the links is several times greater. To avoid damage to the entire transmission mechanism, the chain must be timely replaced.

Do not think that you cannot remove the bike chain from a single speed bike. It is removed in order to be cleaned or repaired.

When do you need to remove the chain from the bike

Let’s figure out how to know if the chain assembly of a multi-speed bike is faulty. You can estimate the mileage of a two-wheeler, but other factors also affect the health of the cycle.

  • Correct selection of gears;
  • Pedal load;
  • Road quality;
  • Driving speed.

The appearance of suspicious sounds (provided that the lubrication is in order) and difficulty shifting gears are the first signs of a chain assembly malfunction. The simplest way to assess the health of links is as follows:

  • Peel back the bike chain from the largest sprocket;
  • If it leaves freely from 3 or more teeth, then the bicycle chain must be replaced. Two prongs are a kind of warning. You can still travel for some time, but it will have to be removed soon.

The same method works for single speed bikes.

An informative method is measuring the length of the bike chain.

  • 30.5 cm is the best length;
  • 30.6-30.8 cm. medium wear, high maintainability;
  • than 30.8 cm. links and sprockets are badly worn. The entire transmission is damaged.

To correctly measure the relative elongation, the chain must be completely removed from the bike.

Types of bike chains

Let’s consider 2 main types of bike chains:

  • Lock;
  • Solid.

Lock

Its peculiarity is that it has a special clamping device. Removing one from the stars, as well as putting it back on, is easy. To do this, you just need to disconnect the lock.

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The location of the detachable link can be determined by visual inspection. If the links are clean, it is not difficult to find the connector. As a rule, the manufacturer’s brand is stamped on the connector.

Solid

It is impossible to completely remove such a cycle. When completely removed from the sprockets, it simply hangs on the frame. Of course, the solid construction is less convenient compared to the version with a lock. However, there are also advantages. The lock may loosen, the connecting plier may be lost. The links are disengaged. There are no such problems with a continuous chain. If it is torn, then this is exclusively a quality cost.

Opening the bike chain lock

This is not difficult. Follow the algorithm.

  • Pry the clip with a screwdriver or knitting needle. It is important not to break the clamp, since it will not work to connect everything back without it;
  • Disengage the link.

Now you can freely remove the bike chain and perform the necessary manipulations on it: shorten, clean or, if it is hopelessly damaged, throw it away.

To disconnect a solid structure, you need a special tool called a squeeze. Using this device will allow you to remove the link without damaging it. The algorithm is as follows.

  • Select the link to be disassembled;
  • Place the bicycle chain in the position for pressing out and pressing in the link axle, or pin;
  • Tighten the screw and pull the axle towards you.

You do not need to completely pull out the pin, as it will not be easy to insert it back into place. Manipulations with squeezing loosen the axle somewhat. Select a different link to re-decouple. Press axle in reverse order.

  • Connect adjacent links together;
  • Press in the pin with the screw.

Bicycle chain repair

The most common defect in a bicycle chain is sagging due to increased length. Of course, you can remove the stretched bike chain and replace it with a new one, but you can try and restore it. Due to the loosening of the axles, the bicycle chain expands in the transverse and longitudinal directions. It is impossible to eliminate the transverse expansion, but with the longitudinal expansion, it is possible that something will work out.

It is necessary to remove excess links in such a way that the bicycle chain passes freely, without unnecessary tension, along the large sprocket. Also use a squeeze when shortening. It is important not to overdo it by pulling out extra links.

The installation of the so-called stabilizers on the bicycle, which prevents the chain from flying off the sprocket when riding, helps. Of course, if you put a pacifier as a temporary measure is a good solution, but you must not forget about replacing the bike chain.

Fitting the bike chain

Putting a bike chain on a singlespield is quite simple:

  • Hang the bike chain on both sprockets;
  • Snap the lock (as an option. press in the pin).

A high-speed bike will take a little longer:

  • Fix switches to small sprockets;
  • Place the chain on the sprockets, taking into account the location of the tension rollers;
  • Connect the links of the chain knot;
  • Squeeze the bike chain and press in the axle. If the bicycle chain is equipped with a lock, then the squeeze is not needed.

The work has been completed. As you can see, there is no difficulty in removing the bike chain and putting it back on. It remains to check the correctness of what was done by turning the pedals. If the cycle runs freely, but without sagging, then everything is done correctly, and its length is optimal.

How to remove a chain with a lock

As already mentioned, this process is very simple and in most cases no special tools are required. Despite the wide variety of types of locks, they all disconnect in almost the same way. If, nevertheless, it is impossible to disconnect the lock manually, then you can use a special tool (see figure below).

How to remove a chain from a bike without a lock

If the chain does not have a lock, then a tool is needed to remove it. squeezing the chain. Without a squeeze, it is quite difficult to disconnect the chain and the chance of damage to the chain links is very high, and it is almost impossible to connect a chain opened in this way. If the chain has to be removed often enough, then it is better to have such a tool in your arsenal, squeezing the chain greatly simplifies working with the chain without a lock.

In order to disconnect the chain without a lock, it is necessary to press out one of the pins (link axis), just for this procedure we need a squeeze. Any link is suitable for this operation, but it should be borne in mind that the next time it is pressed out, it is worth choosing a different link, since each time the pin looses more and more. Ideally, a connection lock should be purchased and installed.

So, we proceed to the direct riveting of the chain. The chain link must be inserted into the squeeze (as shown in the figure below). It is worth considering that most puckers have two grooves for placing the chain, in this case you need to install the chain in the groove closer to the fixing screw. The second groove is only needed for adjustment.

How to chain a bike without a lock

Before reconnecting the chain on mountain and sport bikes, it is necessary to correctly pull it through the rear derailleur rollers, see fig. below, marked with a red line:

Next, we turn to the direct connection of the chain link. To do this, it is necessary to carry out the same operation, only in the reverse order. We place the chain in the groove near the fixing bolt so that the protruding pin looks at the squeeze nose. Twisting the knob, smoothly push the pin back until it fully enters the link. After this procedure, the links into which the pin was pressed should move freely, if this does not happen, then you need to use the adjusting groove for the chain squeeze. Having placed the desired link in the adjusting groove, it is necessary to ensure that the ends of the pin protrude from both ends equally.

If the chain is from Shimano with a disposable connecting pin, press it into the link using a squeeze and break off the rounded end. This tip is needed to simplify the process of pressing the pin.

Here, in principle, is all you need to know about how to put on and remove the chain on a bicycle, as well as disconnect and connect the chain without a lock. If you have experience in disconnecting chains without squeezing, please share it with us.

Malfunction symptoms

First of all, attention should be paid to chain malfunctions on multi-speed bikes. Traditionally, the travel time is determined by the mileage, but these values ​​are too approximate, because everything depends on the conditions of cycling: road quality, gear selection, speed, load on the pedals and, accordingly, on the chainring.

The first signs of a bike chain failure are inaccurate gear shifting and suspicious sounds (provided the chain has not lost its lubrication). The following method will probably help to determine the malfunction: bend it away from the largest sprocket and see the number of free teeth. If the chain leaves three or more teeth freely, then replacement is required urgently. Two prongs “warn” that wear is not far off, but you can still ride.

Using the same method, you can see the weakening of the chain on a single-speed bike: bend it away from the chainring and see the number of teeth.

Another way to measure wear is to measure length:

  • 304.8mm. Optimum Chain Length.
  • 306.5. 307.5. average wear, suitability for repair. You can still ride.
  • 308 mm. high degree of wear on both chain and stars.
  • than 308 mm. damage to the entire transmission.

Measuring elongation requires removing the chain completely from the bike.

Lock and solid chain

The locking chain is equipped with a special clamping device. It is not difficult to unhook and put on it. you just need to disconnect the lock. To find it, we carefully examine the chain on both sides and find a detachable link. In principle, it will not be difficult to find it on a clean chain: a tick is put on top, which fixes the link and does not allow it to move apart. Also, the manufacturer’s inscription is usually embossed on the key link. If you cannot find the lock for a long time, then either the chain is dirty, or it is lockless, or solid.

A bicycle chain without a lock simply cannot be disconnected: all the links on it look the same, however, and are hooked to each other too. This is a great inconvenience when cleaning, for example, it is necessary to carry out a “general cleaning” in a solvent. In the case of the keylock, everything is simple. he stole it and put it in kerosene. Solid bike chain, even taken off the stars, will remain hanging on the frame.

In terms of removal, a chain with a lock is certainly more convenient than its counterpart. However, for some reason, the fastening may become loose: the tick fly off, and the link itself can be disengaged. There are no such weak points on bicycle chains without locks, and if it is torn, then the point is solely in its quality.

Opening the lock and pressing the link axis

Opening the lock is quite simple: use a screwdriver or other object (for example, a knitting needle) to pry on the clamp clamp. The main thing here is not to damage it, or even better. not to lose it, otherwise it will not be possible to fix the chain later. Next, we disengage the entire link. That’s it, you can remove the chain and do whatever you want with it: clean it, throw it away or shorten it. However, we’ll talk about this a little later.

A solid chain can only be disconnected with a special tool. a squeeze. With its help, it will be possible to easily disassemble the link without damage. The procedure is simple, but you shouldn’t rush:

  • First, select the link for disassembly.
  • We insert the chain into the position of pressing out and pressing in the pin (link axis).
  • Use the handle to tighten the screw and take out the axle. Extrusion direction. towards the pressing screw, that is, towards yourself.

You should not completely remove the pin, since it will not be easy to return it later.

The squeeze will loosen the axle a little, so a different link should be selected when re-disengaging. Pressing the axle into the link is carried out in the opposite order: connect the adjacent links together and press the pin with the screw.

Elimination of defects

A common form of wear is chain slack when chain length increases from original length. Previously, the critical values ​​of the length of the bicycle chain were considered, at which it cannot be used. Everything is correct, but the chain does not have to be thrown away immediately, but it can be repaired. Under prolonged loads, the axles loosen, which causes longitudinal and lateral expansion. It is impossible to eliminate the transverse, but it is quite possible to tinker with the longitudinal.

It is necessary to remove unnecessary links in such a way that the chain calmly, without interference, passes over the large star. With the help of a squeeze, excess links are removed, the axial shafts are completely pulled out from the removed elements. The main thing here is not to make a mistake and not pull out too many links.

If you have to ride with an extended chain, then in order to avoid its falling off, you can install so-called chain dampers. parts that prevent the chain from flying off when driving. There are several types of such devices:

  • Roller with two clips.
  • Wide rollers.
  • Frame (or rollerless).

Using pacifiers as protection is fine, but it would be better to consider changing the circuit.

Fitting the chain to the bike

To put the chain on the singlespeed, it is enough to hang it on both stars, press in the pin or click the lock. With high-speed bikes it will be a little more difficult:

  • Fix switches to small stars.
  • Considering the position of the tensioning rollers, put the chain on the stars.
  • Combine links.
  • Clamp the chain and press in the axle. If the bike chain has a lock, we do without squeezing.

After the installation is completed, it is necessary to check the course of the chain: turn the pedals several times. If no sagging or obstruction is observed during torsion, then the chain is of the optimal length and is installed correctly.

Every owner of a two-wheeled horse will be able to cope with the removal and installation of a bicycle chain. An uncomplicated and simple procedure will not take much time, but it will perfectly help on further trips!