The chain on the bike fell off what to do

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!

Curvature of one or more links

Such a problem can be encountered quite rarely, but it can still bother you at any time. If you notice that the links are curved, you have two options. The first is to completely replace the chain. The second is to get rid of the bent links using a special squeeze. Do not use this method on bicycles without variable transmission. On models with gear derailleurs, it is recommended to use this method as a temporary solution.

Deformation of one or more teeth in the chainring or chainring

Why can the teeth warp? The first obvious reason is due to impact, the second is due to severe wear. In any case, if the chain falls off solely due to problems with the teeth of the cassette, then it is necessary to replace it with another one.

Fighting the falling chain

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.

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.

How To Fix a Bicycle Chain That Keeps Falling Off

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

Worn chain-cassette-system

A bicycle, like a car, has its own consumables. This includes all the components of the chain drive. Why do chains and stars need to be changed periodically? Due to wear:

  • The chain is constantly lengthening. This results in an increase in the distance between the elements of one link (rollers). And the interval grows due to the boring of the axes (pins) of their seats.
  • The chain, lengthening, changes the profile of the teeth or, as they say, sharpens the teeth for itself. The wear mechanism is not closely illuminated, but as a first approximation it can be seen that there is plastic deformation of the teeth or the so-called “pulling out”.

chain, bike, fell

It is quite reasonable to ask why the chain slips on a high-speed bike only on some sprockets. The point is, everyone has their own favorite speeds. Usually there are two, maximum three small rear sprockets and one in front. The chain sharpens them, while others remain in the “novya” state, so the chain does not slip on unpopular gears.

Often a new chain jumps over the stars. This is due to the fact that it is installed on old stars. The teeth are stretched out for a larger pitch between the pins than on a new bike chain, which is why slip occurs. often the cassette is to blame, less often the system is also to blame.

Chain damper

The second way to reduce the freedom of movement of the chain is to install a damper. This is a special frame through which the chain runs on top of the chainring and a roller that tightens it from below. When using this system, the likelihood of losing the chain drops significantly, but, of course, there is a fly in the ointment. All this abundance of additional rollers and frames creates additional load on the chain and has a somewhat negative effect on pedaling.

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.

Fighting the falling chain

When the chain falls off, it’s always annoying, isn’t it? The bicycle industry has been struggling with this annoying lack of chain drive all the time. Well, that is, he has enough shortcomings without it, of course, but this one is the most conspicuous.
Various devices are used, ranging from chain dampers to thoroughly worked out technological devices such as a planetary sleeve or a propeller shaft.
Consider in this article different ways to fight to maintain chain stability.

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.

How to put a loose chain on a bicycle

Not long ago, a child’s chain fell off while riding a single-speed bicycle. On a bike like this, this is a serious problem. Neither drive forward nor brake. It’s still good if the wheel doesn’t jam.

READ  How To Quickly Teach A Child To Ride A Bike

This is why an additional front V-brake must be fitted on single-speed bikes. At the very least, it will always help you brake in an emergency with a bicycle chain.

I told him on the phone how to put it back. It seemed to work out, I came home, they began to figure it out and eliminated the very reason that led to this. I decided to describe everything, since this problem often arises, and sometimes it has to be solved in the field.

First of all, you need to understand: why it flies.

What to do if the bike chain falls off?

During the operation of the bicycle, the owner has to deal with a situation where the chain comes off during the ride. This situation is dangerous when driving at high speed, as well as in the process of screwing down a hill. Even if you use slip-on pedals with shoes to keep your foot from flying off the pedal, when the chain falls off, the cyclist can sprint over the handlebars or fall on his side. In this article, we will look at the main reasons why the bike chain flies, and also give practical advice on how to fix this breakdown.

How to fix a chain on a bicycle

Chain damper

The second way to reduce the freedom of movement of the chain is to install a damper. This is a special frame through which the chain runs on top of the chainring and a roller that pulls it from below. When using this system, the likelihood of losing the chain drops several times, however, of course, there is a fly in the ointment. All this abundance of additional rollers and frames creates additional load on the chain and somewhat negatively affects pedaling.

The chain is stretched due to prolonged use

This happens in the process of wear and tear. The switch spring cannot tension it normally, it constantly sags. In this case, there is only one way out. to replace the circuit with a new one. In practice, it is rare to find bicycles in which the chain is stretched and bounced when shifting gears. It is virtually impossible to restore its elasticity.

Do you need a new chain? Find an easy way to communicate it

Your bike chain will gradually wear out with use and will need to be changed from time to time to keep your drivetrain working. Worn chains do not shift well, sprockets wear out quickly and sometimes break.

So when should you change your chain?

“For chain replacement, we do not specify ‘every x kms’ as this is not possible,” says SRAM. “Chain wear depends on many factors, including maintenance (cleaning / lubrication), conditions of use (water / dirt / sand), user shifting behavior, and the overall condition of the transmission (cassette / chainring wear).”

“It is difficult to determine the exact number of kilometers due to the fact that riders come in different weights and sizes, ride differently, switch more or less often, develop more or less power, ride on flat or hilly terrain, clean or poor conditions, take care about them or leave them dirty. all of which greatly affects the degree of wear. says Joshua Riddle of Campag.

“In general, it can vary from 3000 to 8000 km, but in some cases it can be less or even more.”.

First, you need to replace the chain if you notice any damage (deformation or cracking). You should also check your chain regularly to make sure it is worn to the point that you need to replace it.

There are several ways to check if your chain has reached this stage.?

Rear derailleur stop screws adjustment

If your chain comes off at the back, it is often sufficient to simply adjust the stop screws on the rear derailleur.

If the chain slips off the inside of the cassette, place the chain over the smaller chainring (front) and the largest chainring (rear). Then turn screw L clockwise until you see the rear derailleur frame (overhang) start to move away from the center of the bike, you need to move it to a point where the chain can move freely into the largest sprocket, but no further.

If your chain comes off the outside of the cassette, slide the chain over the largest chainring and the smallest sprocket. Then turn screw H clockwise until you see the rear derailleur frame begin to move towards the center of the bike. You need to move it to a point where the chain can move freely in the smallest sprocket, but no further than that.

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Again, if the chain hasn’t come off before but has recently become a habit, the attitude has somehow changed. Before doing anything, make sure the rear wheel is properly seated in the dropouts and the rim is centered in the chainstays, and make sure the rear derailleur and suspension (the part to which the rear derailleur is attached) are not bent. In most cases, the rear derailleur pulleys should be aligned right under each other.

How do I know it’s time for a new network?

Your chain is wearing out. This is a good thing. This means you ride your bike a lot and that’s our goal.

Obviously, if your chain breaks, you will know that it needs to be replaced. However, we want to replace it before we get to this point. There is nothing worse than walking a few miles along the trail and breaking the chain.

The easiest way to check for wear is to pull the chain off the chainring. When you pull it out and see a light between the chain and the sprocket, it’s time to think about replacing the chain.

If you like details, you can measure yourself. Align the rivets with a ruler, the chain should be 12 inches by 12 links. If it’s off, chances are your circuit needs repair / replacement.

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.

How To Fix A Dropped Chain | What To Do If Your Chain Comes Off While Cycling

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

If the chain comes off at the front

How long is the life of a mountain bike chain?

There is one constant in mountain biking. Sooner or later, you will have to replace the chain. The question is when? How can we take care of our chain to last longer and how long can we expect the chain to last?

There are many variables that affect how long a chain will last. It could have lasted for several months, or it could have been much longer. A typical mountain bike chain is rated for 750 miles on a single trail; it’s hard to know exactly how long the chain will last, but there are ways to extend the life of the chain.

Read more: How to Adjust Front Derailleur Indexing

Chain wear indicator

A chain wear indicator, sometimes called a chain tester, is an inexpensive device that does exactly what its name suggests.

This is Park Tool’s CC-3.2 Chain Checker with a suggested retail price of £ 9.99, although you’ll find it cheaper if you look closely. Other brands offer similar tools.

You are engaging the bent end of the chain, and if the probe on the other end fully engages the chain link, the chain is worn to the point that it needs to be replaced (0.5% wear is measured on one side, 0.75% on the other.).