Do-it-yourself bike chain change

How to remove a chain without a lock

Now we will consider step by step how to use the bicycle squeezer correctly:

  • Select the link to be broken. The one from which the assembly of the chain at the factory began is the easiest. If you look closely, it is slightly different from the others. But you can choose absolutely any pin.
  • Have you chosen a link? Place its pin right in front of the release axle.
  • Slowly twist the knob to one side and gradually squeeze out the pin. Make sure that it does not pop out completely, you will not insert it back yourself. Also, do not lose the roller from the link.
  • Open the circuit, remove it, wash and lubricate.

bike, chain, change

If you have already disassembled the chain with a squeeze, do not break the same link. This will loosen it, and the mount will become fragile. Choose a new link every time.

Now you know how to remove the chain from a bicycle without a lock. As you can see, nothing complicated!

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.

Chain measurement

Make sure the chain behaves properly when shifting into any gear without damaging other parts of the bike. For testing, the chain must be installed on the two largest sprockets, front and rear. Even if you never ride in such a gear.

Align the two ends of the chain and identify the extra links to be removed. Use a piece of the bicycle spoke to lock the chain in this position.

When using Shimano chains, there should be a link with the inner plates on one end and the outer plates on the other. Chain from SRAM and KMC must have links with inner plates at both ends.

After the required chain length has been determined, remove unnecessary links. Throw the chain back onto the smallest sprockets.

Attention! On fully suspended mountain bikes, make sure the chain is long enough when compressing the suspension.

Installation of the lock

Pass the plates with the axles into the rollers, align all the grooves and spread the chain in the area of ​​the lock in opposite directions, grasping it with both hands. Again, you can use pliers of the correct profile, if available.
To make the lock finally click into place in the absence of pliers at hand, follow the list of steps:

  • Rotate the pedals so that the lock is on the upper tier.
  • Hold the back wheel.
  • Step on the pedal with your foot. The section will stretch and the link will sit as expected.

How to change the chain on a bicycle?

Replacing a bike chain is an essential skill for every home mechanic. The chain is a consumable material for the transmission of a bicycle. Over time, it tends to stretch and wear out. So sooner or later the time will come for a replacement.

The video below shows the process of installing a new chain on a bicycle. This manual is suitable for both mountain bikes and road bikes.

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.

Worn links

It is believed that the chain stretches due to improper driving. In fact, the chain lengthening effect is due to wear on the rollers and pins. As the chain wears down, it will damage the sprocket teeth, causing the chain to slip. There are special tools for determining chain wear.

An easier way to determine chain wear is to measure 12 links. If the number turns out to be 308 mm or more, then the chain together with the cassette must be replaced. The new chain has 12 links exactly 304.8 mm long.

How to install a chain. video

Removing the lock

According to the technology of changing the chain on a bicycle at speeds, the detachable link is disconnected with special pliers. In fact, you can take in the area of ​​the lock with both hands (preferably with gloves) and pull the ends of the chain to each other.

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 it all depends on the conditions of cycling: road quality, gear selection, speed, load on the pedals and, accordingly, on the chainrings.

READ  How To Change The Code On The Bike Lock

The first signs of a bike chain breakdown 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 comes loose from three or more teeth, then replacement is required urgently. Two prongs “warn” that wear is just around the corner, but you can still ride.

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

Another way to measure wear is to measure the length:

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

Measuring elongation requires removing the chain completely from the bike.

Worn links

It is believed that the chain stretches due to improper driving. In fact, the chain lengthening effect is due to wear on the rollers and pins. As the chain wears down, it will damage the sprocket teeth, causing the chain to slip. There are special tools for determining chain wear.

An easier way to determine chain wear is to measure 12 links. If the number turns out to be 308 mm or more, then the chain together with the cassette must be replaced. The new chain has 12 links exactly 304.8 mm long.

Opening the lock and squeezing the link axis

It is quite simple to open the lock: use a screwdriver or other object (for example, a knitting needle) to pry on the pincer 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 decouple 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 be disconnected only 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 squeeze screw, that is, towards yourself.

You should not completely extract 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 disengaging again.
Pressing the axle into the link is carried out in the opposite order: connect the adjacent links together and press in the pin with the screw.

How to change the chain without a lock on a bike with shifting gears

In the absence of a lock, the technology for replacing the chain is reduced to three operations:

  • Pressing the pin out of any link.
  • Shortening a new chain.
  • Positioning and pressing in the axle on a new bicycle chain.

Tools for the job

How to shorten the chain

Usually a fresh chain is slightly longer than even a tired product. If you put it without shortening, the position of the rear derailleur will not correspond to the required one. The quality of gear shifting suffers from this.

The easiest way to calculate the correct size is to compare the lengths of the old and new chain. It is not necessary to use a tape measure, just put them next to each other. Having combined both ends on one side, on the other we will see a discrepancy in dimensions. Excess links are extruded according to the already outlined method, taking into account the recommendation for incomplete removal of the axis from the hole.

Attention! When removing unnecessary links, follow the logic of their connection: the outer plates are pushed onto the inner ones. The outer plates will not sit on similar outer ones. Consider the design of the suspension: on double suspensions, the length of the chain should be sufficient in the position of full compression of the shock absorber.

How to install a chain. video

Adjusting the chain tension in bicycles at speeds

The tension of the chain on a bike with a parallelogram derailleur (rear) is determined solely by the spring stiffness of the derailleur itself. But the chain, which turned out to be too long, will begin to beat against the frame, since the tensioner will no longer be able to compensate for its slack.

It should be borne in mind that insufficient chain length leads to wear of the main transmission parts, since it significantly complicates their switching. Owners of two-suspension bicycles should especially pay attention to this.

When installing a new bike chain on high-speed models, the chain should be shortened. Several links. But to determine how many specific links need to be removed, there are two possible methods:

  • Pull the chain at the front and rear over the largest sprockets. And then pull on the chain, moving the rear derailleur forward and to the limit. It remains to add 2 links, and you get a chain of optimal length.
  • Or the chain needs to be thrown from the front to the largest sprocket, from the back to the smallest. And pull the chain until the rear spreader frame is in the “straight down” position and the derailleur rollers do not form a horizontal line. This is the optimal chain length, the excess must be removed, and the missing must be added.
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On two-suspension bicycles, adjust the chain (or rather, adjust its length) more correctly by pressing the pendulum down to the position at which the front star cassette will be as far away from the ratchet as possible. The resulting chain length is measured-noted, and all unnecessary is removed.

How to chain a bike

The chain is one of the most important structural elements for the movement of the bicycle. And its service life depends on the regularity and quality of care. An indicator that something is wrong with the bike chain is crackling and squeaking when moving, as well as slipping it on the ratchet.

In principle, it is normal for the chain to wear out over time. And chain stretching is a visual sign of wear. The fact that the chain has fallen into disrepair can be felt even tactilely. In the normal position, this part sags slightly (by 10 or 12 millimeters), and if you pull it slightly, it will yield another 10-15 mm. True, this method is relevant only for models that do not have high-speed switching or there is a planetary type gear.

How to Replace a Chain on a Bike. Sizing & Installation

Adjusting chain tension on bicycles without gears

For bicycles to function flawlessly without speeds, their chain must not be too tight. It is necessary to ensure its free sagging for a length of up to 5 mm. And in order to pull in this way, you need to perform a certain set of actions in the correct sequence:

  • Turn the vehicle over with the wheels up.
  • Loosen the rear wheel. unscrew the nuts or fastening eccentrics.
  • Adjust the chain slack to the required amount. To do this, you need to carefully move the wheel along the inclined grooves (dropouts).
  • At the end of the adjustment, the wheel should be fixed to its original position again. In this case, the wheel axle must be parallel to the carriage shaft.

If the chain is too tight, it will become difficult to pedal. And the elements of the chain drive will very soon become unusable. It is also bad if the bike chain is too slack. She will simply jump off the stars at a certain moment and it will be impossible to go further.

When the wheel literally rested on the dropouts and there is absolutely nowhere to move it further, but at the same time the bicycle chain is dangling, you will have to remove a couple of links from it. In all likelihood, it was stretched or was not at all the size for a particular model.

Link removal

Conventional speedless bikes are equipped with collapsible chains, one of the links of which has a special lock. But on professional bikes, one-piece chain structures are installed, all links of which are perfectly riveted.

However, disassembling a one-piece bicycle chain is also easy. And this can be done in one of two possible methods:

  • grind pin heads on one of the chain links with sandpaper;
  • or using a universal tool. squeeze.

By the way, it is not for nothing that the pomace is called “universal”. It can not only squeeze out the pin, but also securely fix the newly assembled bicycle chain. After all, the squeeze (well, at least most of them) have a couple of special functional and technological grooves. And one of these grooves the pin is pressed out of the roller, and the other is pressed in. As for the installation place, which is located on the squeeze a little further from the pressing screw, it is intended for riveting the chain pin itself.

Slipping like a chain drive defect

Every cyclist is familiar with the problem of chain slippage. The chain will stretch over time and the tension will loosen. In addition, chain stretching leads to quick wear of the bike sprockets. It would seem that what is easier. you just need to remove 2 links. But the “trick” is that you can do this only once, and then you need to change the chain.

And further. A new chain on an old ratchet is not ice at all. Slipping will probably remain on small sprockets. So you need to change the ratchet too.

New instructions

What are the bearings

Bearings are of different types: sliding and rolling.

Bicycle Chain Replacement. No Specialty Tools Required!

The principle of operation of sleeve bearings is when two elements rotate tangentially with respect to each other. A material for manufacturing is used, which has a relatively low coefficient of friction. This is mainly with a bronze and steel component. During operation, a bearing part rubs against another part and a workout is formed in the products.

A distinctive feature of the rolling principle is that they have balls. They are called rolling bodies. These balls are located in the inner rings.

This type of bearing is applicable to bike carriage assemblies, bushings and steering columns. The fundamental feature is that there must be strength and abrasion resistance.

Distinguish also parts according to the separation method and industrial use.

In the presence of a separator mechanism, it implies the openness of the part. The device in the separator, each ball is in the groove and is fixed with a cone nut. The assembly is placed directly in the part. The advantage of this design is the relative ease of removal and installation of the bearing. This is especially beneficial for field repairs. Assembly parts can be replaced separately.

READ  How to tighten the chain on a speed bike

The inconvenience in it lies in the fact that it is necessary to adjust and clean it from dirt quite often.

In the industrial form of the bearing, it is enclosed directly in the space of the assembly. Due to the closed nature of the product from the environment, dirt, dust and water with sand do not get there. The lubricant is retained for a long time, while the service life is extended. There is no need to adjust this bearing. However, if the part fails, then replacement is more difficult. It’s hard to do this in the field. Well, the price is much higher than in the first option.

I would like to mention one more bearing brand that uses ceramics or metal ceramics. This material is highly abrasion resistant and corrosion resistant. Temperature drops are not terrible for him. These bearings are used, as a rule, in expensive bicycles.

The need to replace the bearing

The main task of the bearing is to fix and correctly work the unit.

In this case, the bicycle pedals should rotate smoothly.

The carriage very often fails. This is where the pedals and cranks connect. A broken bearing in this assembly will make driving impossible.

Depending on the type of the carriage of the bicycle, the work of the parts may be different.

When the carriage is closed, sand, dirt, water and dust will not get inside. This does not lead to a decrease in the life of the part.

There is an open caret type. The device is complex. All carriage products are inserted into cups. They, in turn, are in a carriage glass. This is all built into the tube of the bicycle frame. This is how the rotation happens.

The specified type of knot is vulnerable during operation, much more than other parts of the bike.

Therefore, the bearing must be changed frequently.

Let us now consider the purpose of the bearing, its classification and the principle of rotation.

Replacing the rear hub bearing on a bicycle with your own hands

After reading this article, you will learn how to replace a failed bearing on the rear hub yourself.

A bearing is a product that ensures the normal operation and fixation of the moving parts of the bicycle.

The specified part is present in all nodes that mate parts with the rotation of the mechanism.

How to make a DIY replacement of the bearing on the rear wheel hub of a bicycle?

Replacing the bearing on the wheel hub is not very problematic.

Although you need a little skill or read my article carefully.

The reasons leading to the failure of the parts are different:

But if a bearing breaks down, it needs to be replaced.

When choosing a new product, you need to focus on the brand of the bike assembly.

By mistakenly installing a bearing that does not correspond to the bicycle’s passport, you risk your safety when driving.


Enter the mark or size (for example: 8227) of the product and the country of sale

Step-by-step instructions for replacing the bearing on the rear wheel hub

The bushing (axle) allows the wheel to rotate. It rotates in the presence of a hinge mechanism. It transfers the efforts from the muscular strength of a person and the movement of the bicycle occurs. When the part is worn out, the bike stops moving.

When you determine that the bearing is out of order, it needs to be replaced. In this case, it is necessary to disassemble the sleeve.

In the case of a rear wheel, it is more difficult with it. To get to the bushing, you need to remove the cassette together with the sprockets.

If you have a bike with one speed, then you need to remove the retaining ring and sprocket.

I advise you to carefully read the article and replace the bearing yourself. You do not need to contact professional specialists. you will need money. Better save and fix yourself.

You have decided to perform a replacement, then follow the instructions:

Installation is carried out in the same sequence as, and dismantling only the other way around. We pay attention to the installation of all parts without skewing. Backlash is not allowed.

We check the correctness of the bearing replacement. We manually scroll the wheel. If it rotates smoothly and quietly. you did everything right.