How to disengage a bicycle chain lock


The chain lock greatly facilitates the dismantling procedure. Buy and install it ahead of time so you can easily unzip the part on the go if needed.

Bicycle chain locks

Modern bicycles are equipped with speed switches that make cycling more comfortable and allow you to adapt to any terrain and pace of movement. Such a knot consists of two to three front and seven to ten rear sprockets along which the chain moves.

The bike chain on multi-speed bikes needs regular, quality maintenance. cleaning, rinsing and lubrication. Factory bike chains are usually one-piece and difficult to dismantle without a specialized tool.

In order to be able to quickly remove the part and put it back on, it is recommended to install a bicycle chain lock. These are special collapsible links of the bicycle chain that allow you to disconnect the bicycle chain during service or repair, and after completion of work, connect the part back.


If you are going on a bike trip, it is advisable to have a spare bike chain lock with you. It will come in handy in case of repair.

How To Remove a Bicycle Chain


Experts advise using three bike chains and changing them alternately every 500-600 km to increase the resource of the mechanism. Remove chains clean and apply preservative lubricant before storage to prevent rusting.

Main types

The collapsible links of the bike chain can be divided into two large groups. for single-speed and multi-speed bikes. Bicycle attachments without derailleur come with extended pins and an additional spring-loaded cheek piece.

For multi-speed models, the two most commonly used bike chain connector designs are:

  • with symmetrical elements;
  • with spring type cheek.
Lock with symmetrical elements Spring cheek attachment
Constructive device Consists of 2 identical parts. Each element is a chain cheek with a pressed-in pin and a figured hole for a mating pin Constructed from two different elements. a cheek piece with two pins and a spring steel counterpart. The second cheek has an oblong hole with an extension along the pin diameter
How to open? To disconnect, push the pins towards each other until they coincide with the extended area of ​​the hole. To remove the lock, you need to bend the bicycle chain until one of the pins hits the extended part. To open, it is enough to disengage one pin from the engagement with the cheek.
How to close? To fasten the device, the pins must be inserted into the holes and tighten the bicycle chain Installation is in the reverse order. It is necessary to throw a spring plate over the pin and pass it through the hole. Next, you need to bend the chain and insert the second pin

The lock with symmetrical details is characterized by simplicity of design and reliable connection. Due to the spring effect during tension, the risk of accidental release of the device is minimized.

A spring-loaded cheek lock is more complex. It allows you to open the circuit not completely, which is often more convenient.

On a note:
Cycle locks are produced by many brands, the most reliable products are Shimano, KMC and SRAM.


Sooner or later, every rider has to repair the bike chain. Therefore, it is important to understand in advance the intricacies of dismantling and installing component elements.

Installing the fixture

The bike chain connector consists of two plates that can be easily connected and disconnected thanks to special pins (pins) with an annular groove.

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When choosing a device, you need to be guided by the width of the chain for which the device is intended. This parameter differs depending on the number of speeds in the cassette. All bike chains have the same pitch.

To install the device, you must first remove several links of the bicycle chain. This requires a special tool called a squeeze. It minimizes the risk of damage to the part. A bicycle chain lock is installed in place of the removed links. Next, the structure is stretched and installed back.


Service the cycle regularly and check the wear of the mechanism elements. Otherwise, you may find yourself in a situation where gears start to “jump” on the road.

Bike chain

The bike chain is one of the key components of the drivetrain. It is the chains in perfect condition that guarantee the adequate operation of the entire mechanism. When buying a bicycle, no one will choose a new chain, but over time, replacing a worn-out part is inevitable. How do you choose the perfect chain for your bike? How many chains do you need in a bicycle farm? How to properly change the chain yourself so as not to contact the bicycle master for every trifle? These skills and knowledge will not be superfluous.

Bicycle chain problems

One of the most common problems is chain slack. This process is due to the fact that the axles gradually wear out during movement, which leads to sagging of the chain. This process cannot actually be prevented, so it is simply necessary to remove excess links as lengthening.

In order to shorten the chain, you will need a chain squeeze and pliers:

  • Disconnect the chain, remove the squeeze.
  • Determine the number of extra links (the best way is to pass the chain through large sprockets).
  • We remove unnecessary links according to the principle of disconnecting the chain.
  • We connect the chain and check its mobility.

Chain slippage is another problem: depending on the level of neglect of this problem, the cyclist may encounter either minor inconveniences during the ride, or serious difficulties leading to possible loss of parts, injuries and accidents. Among the reasons for chain overshoot are the following:

  • Caliper adjustment. In the middle positions, this can lead to the fact that the chain will jump over the sprockets, and in the extreme positions, it wedges between the frame and the sprocket. To avoid such difficulties, it is necessary to adjust the calipers in a timely manner: at the same time, do not forget about those gears that are not often used (for example, 1-1 or 3-9).
  • Deterioration of the chain or its components. The critical mileage of a bicycle can be from 2 to 8 thousand km: when these indicators are reached, the chain begins to jump off under increased load, then more and more often. In this case, you can notice a certain looseness of the chain, as well as an uncharacteristic sharpness of the sprockets. This problem can be solved only by complete or partial replacement of the damaged element.
  • There is dirt or rust on the surface of the chain. Particles of dirt, ice, grass or dirt can cause chain malfunction. In this case, it is easy to eliminate overshoots: you just need to clean and lubricate the chain.
  • Twisting or breaking the chain. Twisting is an easily solvable problem, arising from an unsuccessful weaving or removing a jammed chain. To eliminate it, it is necessary to find the damaged link, carefully bend the chain and straighten the defect. Breaking, of course, requires more serious effort: replacing a damaged pair of links or the entire chain.

Replacing the chain on a bicycle: remove and install correctly

Experts advise adhering to some simple guidelines that will allow the bike owner to avoid possible chain problems:

  • do not ride on heavily skewed gears;
  • timely lubrication of the bike chain will help you protect it from early breakage.
  • do not use greases and WD40 type lubricants as chain lubricants;
  • use multiple replacement chains to extend their life.
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How to REMOVE A BIKE CHAIN without special tools (don’t do this to your triathlon bike)

If the chain still needs to be replaced, it is important to approach this issue competently and professionally. Before starting work, check which chain is on the bike: with a lock or not. As a rule, chains with locks are only found on children’s or cheap bikes. To remove a chain of a similar design, you just need to find the lock and remove it with a simple screwdriver.

The situation is more complicated if there is a chain on the bike without a lock, that is, with a pin. To work with it, you will definitely need a special tool. a squeeze, which will allow you to quickly and easily remove the chain without damaging the links. The sequence for removing such a chain is as follows:

  • It is necessary to select a segment of the chain for disassembly (experts advise to select different segments for each new procedure with the same chain, since disassembly loosens them).
  • Insert the chain into the release tool. This can be done as follows: either using the seat located at the fixing screw, in which you can press in or press out the axle, or. in the second position, only the inner part of the bushing is adjusted.
  • Press out the axle towards the reinforcing screw (the squeeze screw is tightened with the handle).

Before installing the chain on the bike, the exact length must be determined: if the length is insufficient, then the chain will not allow easy gear shifting, and too long will dangle.

Installing a chain on a bicycle is a simple procedure and, with proper skill, is easy, you just need to carefully perform the following steps:

  • Installing switches on small asterisks.
  • We put the chain on the bike, taking into account the correct location of the tensioner rollers. the lower one bypasses on the left, and the upper one. on the right.
  • After the links are aligned and secured with a screw, you can clamp the chain in a squeeze.
  • Carefully press in the axle, slowly rotating the squeeze handle: watch the immersion level relative to the adjacent links.
  • We check how the axle works. freely and without jamming, whether it protrudes.

Chain: choice and proper care

For people who still remember Salyut bicycles, the suggestion “to choose a new chain for a bicycle” sounds somewhat wild. For some reason, then the chains served almost longer than the bicycle itself. The answer is simple: in those bicycles only one speed was provided, so the chain was constantly in a calm state and did not wear out as quickly as on modern bicycles. Now even the most budgetary iron bike is equipped with the ability to change speeds, which leads to chain wear. Modern chains are undoubtedly stronger and more reliable if, with such use, they are able to withstand such loads.

So, it’s time to replace the chain on your own bike: what should you pay attention to, which chain to choose? The most popular manufacturers are KMC, Shimano and SRAM. In the lines of these manufacturers, you can find chains of various costs and different qualities. All these chains easily replace each other and, if the cyclist has a desire, he can go through the chains indefinitely until he finds the one that will completely suit him.

TIP! For a cassette of 7-8 stars, you should purchase a chain for 8 gears, for 9. for 9 and so on.

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When purchasing a chain, you should pay attention to the marking: usually firms put information about the quality of the chain in the number designation of the model. For example, CN-HG53 will be much simpler than CN-7701.

For adequate chain operation, it is important to be able to notice in time the moment when the chain already requires replacement or repair, but the rest of the transmission is still intact. An overly worn chain not only threatens with driving problems, but also gradually “kills” the stars: in this case, not only the chain itself will have to be changed, but also a rather expensive mechanism. the cassette, and sometimes the system. The most truthful way to determine chain wear should be considered not the mileage (sometimes 100 km of country walks on off-road and dirt will go for 1000 km of quiet city bike rides), but the length of 24 links of the chain:

  • in a normal state, this figure is 304.8 mm;
  • 306.5-307.5 mm. a reason to change the chain;
  • 307.5-308 mm. signals not only a worn chain, but also problems with sprockets;
  • than 308 mm. serious difficulties with the chain, cassette and system condition.

Another way “by eye” to find out how worn out the chain is, the following is considered: after installing the chain on a large sprocket, it should be easily pulled back with your fingers and check how many teeth are visible on the chain. If you can see two teeth on the star, the chain is worn out, but still suitable for driving, and three teeth indicate the complete deterioration of the chain and the need to replace it immediately. Also, extraneous sounds from a lubricated chain often signal that it is worn out.

disengage, bicycle, chain, lock

TIP! Experts recommend having three chains “on the farm”: each of them should be operated for 500-600 km, then change them, choosing the shortest one. Thus, the life of the chains and the entire transmission can be significantly extended.

Chain damper

When the bike moves, the chain is subjected to loads that cause it to fall off. Because of this, you can get an injury. To prevent the use of a chain damper on a bicycle A chain damper is a range of accessories. Usually, this is a construction of two rollers and rockring. It is placed in place of the front derailleur on the frame, providing protection for the sprocket and keeping the chain from flying away. Many models are made at home.

The power part that protects the chainring from impacts is rockring. It partially performs the function of a damper and is produced commercially. Made in the form of a circle, the size is larger than the star. Rockring is attached as standard, and can be operated in tandem with a gear selector. The main element of “calming” is the roller supporting the chain.

  • Rollerless. The chain is held in place by the frame. This is a simple option.
  • With a pair of rollers. one on top, one on the bottom.
  • Wide castors. for sport bikes.

Types of damper attachment:

There is a damper on the cassette. It is mounted at the back. It is rarely found on professional bicycles, more often on ordinary ones. It is easy to make, but it is a hindrance to gear shifting, consumes energy.

, maybe 5000 rubles. There are only four normal companies. Truvativ. This is a brand from SRAM, a firstborn of quality, a legitimate product. British Hope. Uses the most advanced materials. Funn is a very expensive brand and is overpriced. The most popular company is Shimano. Its products are designed for a Russian buyer.