Bicycle chain repair
The most common defect in a bicycle chain is its sagging due to an increase in 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 excessive tension, along the large sprocket. Also use squeeze when shortening.
It is important here not to overdo it by pulling out extra links.
The installation of the so-called stabilizers on the bicycle, which does not allow the chain to fly 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.
Removing the chain from a bike
The need to remove the bicycle chain occurs when it needs to be replaced, washed thoroughly or boiled in grease (in the case of a single-speed chain). Therefore, a small beginner’s guide.
It is possible to remove the chain from the bike only by removing the axle connecting the links (pin). You can squeeze out the pin without a tool, right in the field by placing the chain on the edge of a hard object and tapping the axis with a thin knitting needle.
Unfortunately, this method will not allow you to assemble the chain back, because there will be nothing to press in the pin. Therefore, to remove the bicycle chain, you need to have a special squeeze device, it is best to take a multitool, which includes all the main bicycle keys, including the squeeze. I have one like this. very satisfied.
Place the chain link on the squeeze so that the pin is directly in front of the tool release axis. Then just gently twist the handle, and the pin is squeezed out.
The main thing is to stop at the end so that the pin does not pop out completely, otherwise then your vocabulary will not have enough swear words to push it back.
Below is a video showing what I’m talking about (1:05).
In general, ideally, I recommend putting the lock on the chain, this allows you to remove and put the chain on the bike instantly.
When installing the chain on a multi-speed bike, you need to follow the pattern of pulling along the rollers of the rear derailleur, I painted in red in this picture:
How To Open A Tight Chain Quick Link, Without Special Opener Tool. 4 Tricks.
Everything is very simple, and there is absolutely no need to go to the bike master because of some minor problem with the transmission.
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 serviceability of the cycle.
- Correct selection of gears;
- Pedal load;
- The quality of the roads;
- Driving speed.
How to remove A Quicklink without the MLP-1.2 tool | Home made bodge
The appearance of suspicious sounds (provided that the lubrication is in order) and difficulty with changing gears are the first signs of a malfunction of the chain assembly. 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. the 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.
How to change the chain on a bicycle
How to remove a spring-loaded cheek lock
This is the most difficult stage, it is not always possible to do it with bare hands. We need a screwdriver to remove the lock. As in the case of installation, you need to bend the chain so that the pin goes to the place on the bar where it can come out, but this does not happen without a screwdriver. You need to help the pin to free itself from the bar, so you need to hold a screwdriver in one of the hands and bend the chain, pressing on the pin with a screwdriver at the moment it approaches the expansion in the bar. As soon as the pin is released, you will hear a click. this means that everything worked out for you correctly.
These locks are not intended to be reused, they usually bend after being removed. But you can always try to bend it back and put the lock again if there is no other lock at hand.
We will now consider how to use the chain squeeze.
First, we 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.
View 3.1: Spring loaded cheek piece with two holes
There is another type of spring-loaded cheek lock. This is when the cheek itself has not one hole, but two, but the principle of installation and removal does not differ from type 3.
How a lock of this type opens and closes can be seen below:
It is important to note that depending on the number of stars on your cassette or ratchet, the chain width changes, and, accordingly, the lock itself. Therefore, you need to pay attention when buying a lock so that it is the same width as the chain.
What types of castles have you met? Share in the Комментарии и мнения владельцев, I will definitely add the material.
How to remove a chain lock with 2 symmetrical pieces
To remove the symmetrical lock, you need regular pliers. We bend the chain so that it resembles the letter “P”, where the top of the letter is our lock. In this position, we need to press on the lock with pliers obliquely (diagonally) in order to move the two parts of the lock (press with pliers from the sides where the pin comes out of the cheek). The method works perfect! And the hands are safe, and it takes 15 seconds.
There is also a way to remove it with your hands. ropes or cables. this is when the pins are wrapped with a rope and then pulled together, but usually “tight” locks do not open in this way.
How to remove a chain from a bicycle. Chain squeezing. what is it and how to use it.
In the last article, we looked at how to wash and lubricate a bicycle chain.
One way involved removing the chain from the bike. A natural question arises. how to quickly and easily remove the chain from a bicycle.
The first thing I want to say right away is that it is best to work with the chain with gloves. there is less chance of getting your hands dirty with oil and then washing them for a long time. But, in general, this advice is not for everybody.
Here you need to understand the following: there are chains with a special lock and chains without a lock.
Locks of single-speed and multi-speed chains differ in the type of blocking. In a multi-speed chain, the rivets should hardly protrude above the side plates, otherwise they will interfere with gear changes. The locking link for a multi-speed chain consists of two halves, each of which is a cheek with a pin pressed on one side.
Even if your chain does not initially have a lock, it is better to put it on when you first remove the chain, when you decide to wash it. Believe me, it will be much easier in the future to remove and install the chain. There are many separately sold locks on the Internet for a wide variety of chains, both for single-speed and multi-speed models.
How to repair the chain yourself
The chain becomes wider and longer by increasing the distance between the parts. This is because the pins become loose with regular stress. The chain must be replaced with a new one when it lengthens by 0.5%. If you do not have a special tape for measuring, use another method:
- Place the chain on the drive sprocket and pull it away from the teeth.
- Measure the distance you can pull the chain. If it is more than 4 teeth, it needs to be replaced or repaired.
What to do? Remove the chain and remove a few extra links so that it passes freely, but without sagging, over the large sprocket. You can remove extra links using squeeze. Only in this case the pins are squeezed out completely. Don’t overdo it and don’t take away too much.
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.
How to REMOVE A BIKE CHAIN without special tools (don’t do this to your triathlon bike)
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 of 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 a stretched chain, then in order to avoid its falling off, you can install the so-called chain dampers. parts that prevent the chain from flying off when driving. There are several types of such devices:
- Roller with two locks.
- Wide rollers.
- Frame (or rollerless).
Using pacifiers as protection is fine, but it would be better to consider changing the circuit.
How to remove a chain on a bicycle | Replacing the chain
How to remove a chain on a bicycle | Replacing the chain
The bike drivetrain is the most moving part and carries the most load. The transmission includes a system (cranks with stars), a cassette or ratchet and a chain, respectively, these parts wear out quickly and require timely replacement.
It is recommended to change the chain every 1500. 2000 km as it stretches and can harm the rest of the transmission.
How to check if the bike chain is stretched:
1) The easiest way is to put the chain on the third sprocket (the largest), then pull the chain away from the stars, if you see two teeth on the star, then the chain is worn out, if three teeth, then it urgently needs to be changed.
2) If YOU hear a “rustle” while driving, even if the chain is lubricated. this is also a sign of wear, if the rustle is heard even without load. urgently change the chain.
3) The most accurate way to measure a chain is with a ruler, for this measure the distance from the center of any pin to the center of the 24th pin after it. If the result is equal to 304.8-306.4 mm, then everything is in order with the chain. If the result is 306.4-307.9 mm, the chain is worn out. And if your result is more than 307.9 mm, this means that not only the chain is worn out, but also the cassette, and maybe the whole system.
How to replace a chain on a bike:
There are two types of chains: with a lock and with a pin
The chain with a lock is installed on cheap children’s bicycles, to replace such a chain you just need to remove the lock with a screwdriver or pliers.
Pin chain. In order to remove such a chain, you will need a special device. squeezing the chain, of course you can remove such a chain with a hammer and an awl, but putting it on so as not to damage it is very difficult.
How and with what to lubricate the chain:
It is recommended to lubricate the chain after each ride, but as a rule, very few people do it, whether because of laziness or because of ignorance. There are special devices for washing and lubricating the chain. the chain is washing, it greatly facilitates the process, but you can do without it. Under no circumstances do not lubricate the chain with a thick lubricant (lithol, grease, etc.), use a special oil for the chain, silicone lubricant, or, in extreme cases, liquid car oil.
If you are using aerosolized silicone grease, simply spray onto the chain pedaling backwards until a circle is complete (also when using oil). You can also lubricate the switches in moving parts. IF YOU HAVE DISC BRAKES WHEN LUBRICATING THE CHAIN BE CAREFUL, so as not to get on the disc or pads.
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. Component elements:
- Outer plate;
- Inner plate;
- Pin (roller);
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. Periodic 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, the pores when a new part is needed. Without special tools for measuring, 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 the resulting space contains more than 4 teeth, then the bicycle part must be urgently replaced.
On singlespeeds, as a rule, the chain is designed for the entire life of its operation: when moving along the stars, it walks smoothly and straight, without deviations. Chains are more complicated on multi-speed bicycles: there is no right angle between the front and rear sprockets, which is why it is always at an angle relative to the frame. The stresses on the chain mechanism increase several times compared to parallel transmission, which leads to periodic wear. To avoid damage to the entire transmission unit caused by wear of the chain, it must be replaced in time.
Not only do the “speed” chains need to be removed, they are often removed from single-speed bikes for periodic repairs or cleaning. How to remove the chain from the bike and put it back, we will tell you in this article.
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 together too. This is a big 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. I 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, of course, more convenient than its counterpart. However, for some reason, the fastening may loosen: 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.
What tool is needed
We recommend purchasing a bicycle multitool. This is a very cool thing that any rider will need. A multitool can help out on a long trip. It includes a tool such as a chain wringer. It can be used to easily open the chain links.
By the way, the bike squeeze is sold not only as part of a multitool, but also separately. You will also need special pliers or pliers, a piece of wire, a thin cable from the brakes or a rope.