How to make rear brakes on a bike

Defective brakes

Bad brakes are every cyclist’s problem. I don’t really want to carry out checks before each trip. It is tedious and time consuming. But here’s the problem. it’s necessary. A routine brake check can save lives and health. Adjusting the brakes on a bicycle is a painstaking task. Therefore, it is so important to be able to do it right.

Caliper brakes

The appearance resembles a tick, with a similar working principle. The brake levers are in an X-shaped connection and are attached to the base frame at one point. Simplicity of design and easy setup do not bring this model to the top of popularity.

The reason is the unreliability of the design and the relatively large weight. If lumps of dirt get in, misalignment, or deformation of the rim, the levers are skewed, which causes a number of additional problems. Including increased friction of the pads, and their premature wear. No less significant drawback. certain restrictions on the use of tires with a wide profile.

We set the levers symmetrically

In order for the left and right pads to wear evenly, they must be at the same distance from the rim. Adjustable by spring tension on the brake levers. To equalize the force that returns the left and right brake levers to their original position, use the adjusting bolts located at the base of the levers.

By twisting the bolt clockwise, we tighten the spring, unscrewing it. we loosen it. By pressing and releasing the brake, we check the uniformity of the removal of the pads from the rim. Tighten the bolts on the left and right sides until the pads move the same distance when the brake lever is released.

V-brakes systems

The vector design is by far the most advanced and popular version of rim brakes. Levers with attached pads are connected with a cable and adjoin the wheel in the form of a V. Characterized by ease of maintenance, high reliability, low weight.

In recent years, V-brake kits have been gaining ground in professional sports, overtaking disc-type systems. The reason is increased operational safety. For example, at the 2015 Tour de France races, a racer severely injured his hand as a result of a fall and hitting his forearm on the rotating disc brake rotor moving in front of the bike. Consequence. Many riders find it warranted to switch to vector brakes.

Scheme of work

The principle of operation of the system is based on the use of the friction force arising in the process of interaction of brake pads and wheel rim.

Structurally, any rim system includes:

  • paired levers for the front and rear wheels;
  • brake pads made of dense rubber;
  • control handles;
  • cables connecting all components;
  • brake cable covers.

The scheme of the kit is quite simple. When physically acting on the control handle, the force is transmitted through the cables to the levers with pads attached to them. There is a clamping of the wheel rim between the surfaces of the pads. As a result, the bike slows down or stops. The more the application force, the more the rim is clamped, the faster the object slows down.

Compared to other types of rim braking mechanisms, they have a lot of advantages: they are not expensive, easy to maintain and repair, have a high degree of modulation, practically do not have a harmful effect on the hubs and spokes of the wheel.

At the same time, this design has a number of significant disadvantages, which are recommended to be taken into account when choosing and purchasing a bike.

Security issue

Safety comes first! Yes, this rule is worth remembering every time you want to ride a bike. After all, many ordinary walks end in injuries. And the cyclists themselves are most often to blame for the accident. It is their inattention that leads to dire consequences. Inattention. what can we mean by this? First, a disdainful attitude towards the object of the ride itself, namely the bike itself. Its malfunction is often the reason for unwanted injuries.

Adjusting the position of the pads

Apply the brake by squeezing the levers and placing the cable guide (C) against the stop (D). Loosen the block fixing bolt (K) with a hexagon. We press the lever with the block to the rim and set the block so that it:

  • adhered to the rim with the entire surface
  • did not touch the tire
  • located parallel to the rim
make, rear, brakes, bike

In this position, the block must be fixed by tightening the bolt. When tightening the bolt, the block may move and must be corrected. It will be easier if you find an assistant who will grip and hold the brake lever while you tighten the bolt.

If your brakes squeal, try the following.

Before tightening the bolt, place a folded sheet of paper under the rear (in the direction of travel) of the shoe, then tighten the bolt. So the pads will be smoother to press against the rim during braking (first at the front, then at the rear) and will not squeak.

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We do similar operations with the second block.

First steps in repair and adjustment business

As always, start simple first. In this case. from the repair of the simplest brake system. rim. V-breaks are not famous for their ingenuity. A device as simple as two or two. What does this mechanical brake system consist of? There are levers that are mounted on the steering wheel. There are tubes (it is correct to call them shirts), inside which an iron cable fidgets. Two clips and pads. Everything is nothing more. That is why there are only three positions on which it is worth adjusting the V-break.

The first is to control the distance between the pads and the wheel. The second is to control the direction of the pads. The third is the degree of tension of the clamps. For beginners, this can seem daunting, especially in practice. But experienced amateurs can assemble a disassembled brake in just seven minutes.

How to check and adjust the brakes

There are clear instructions for checking and adjusting the brake system of a bicycle. If you adhere to it, then the whole process will take little time and will be effective.

Procedure for checking and adjusting the brake system of a bicycle:

  • Dry brake test. It is necessary to raise the front wheel and, having unwound it, press the left brake lever. If the wheel comes to a sudden stop during this test, the braking system is in order and no maintenance is required. It is worth considering one nuance. if the brake lever touches the steering wheel, then you just need to pull the cable. The operability of the rear wheel brake system is checked in the same manner. To tighten the cable, you need to use curly bolts. just tighten them a little and, if only minor adjustments are required, this will correct the situation. It often happens that such a minimum adjustment does not work. in this case, we look where the end of the cable is on the bike (it is always longer than necessary in advance), unscrew the bolt that holds it. It remains only to tighten part of the cable with pliers and tighten the bolt, applying the possible force.
  • Checking the brake pads. After the brake levers have been tested, the condition of the brake pads should be carefully examined. However, the order of action can be changed. first work with the pads, and then with the handles.
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The setting of the brake system for rim and disc type is different, since different rotating mechanisms and pads are used.

Adjusting the brakes (V-Brake)

Setting up the brakes means paying attention to every detail, from the brake levers to the brake pads.

First step. Adjusting the brake levers

Brake levers should be located so that they can be reached quickly and comfortably. In order to adjust the position of the brake lever, loosen the fastening screw, place the handle as it is convenient for you and fix it. Usually there is a screw on the brake lever, with which you can adjust the distance of the brake lever to the grip. adjust the position of the lever with it.

make, rear, brakes, bike

Second step. Position of the brake pads

It is easier to adjust the position of the brake pads as follows: press one of the pads with your hands close to the rim, adjust its position. Make sure that the block is not too low (the edge of the block is below the rim), but also not too high. the block touches the tire.

I would like to draw special attention to the next moment, since there is little clear written about it. Until the nut of which the shoe is fixed is not tightened, the shoe has three degrees of freedom: the washers form something like a ball joint. (Pay attention to how many washers are there? That’s what they are for!). It is believed that the leading edge of the pads should touch the rim slightly earlier than the rear. Therefore, we do this: put a small gasket under the rear end (see fig).

This number of washers is needed to get something like a ball joint

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Now you can tighten the nut that fixes the shoe.

Step three. Centering the positions of the levers

At this step, you need to fix the brake cable: so that the brake pads touch the rims at least a little if you press the brake lever. At the bottom of the levers there are special bolts that adjust the tension of the springs that press the pads against the rim.

We set it up as follows: press the brake and see which of the pads touches earlier. For the one that touched earlier, we increase the spring tension (or vice versa, weaken it on the other side). It is necessary to ensure that the pads touch the rim at the same time.

Fourth step. Adjusting the distance from the pads to the rim

I believe that this distance should be as small as possible. (1-2 mm. If the rim is even). But then the brakes will work very sharply. the slightest pressure leads to sharp braking. Therefore, the distance can be made a little more.

The distance is adjusted in two steps: first, due to the screw with which the cable is attached to the brakes. Then fine tuning on the brake lever.

The large washer acts as a lock: when it is tightened, the cable tension adjustment screw cannot be turned.

How to set up rim brakes on a bike

The braking system is one of the most important technical components of a bicycle. The safety of both the cyclist and other road users directly depends on its condition. Good brakes are essential in any situation, from riding in parks to tough cycling.

In the modern classical sense, a bicycle brake is a pressure mechanism that acts on the wheel rim. In fact, there are several types of brakes, however v-brake (rim) is the most common option on bicycles of various classes.

Setting up disc brakes

As a rule, adjustment of disc brakes consists in periodically tightening the cable. But often you have to replace the pads, however, on disc brakes they wear out longer than on rim brakes. First you need to find out which specific disc brakes are installed on the bike. brake pad adjustments for hydraulic and mechanical systems will differ.

Experts recommend taking note of the following points:

  • If there are hydraulic disc brakes on the bike, then replacing the pads may not be necessary. they are able to do it on their own. But one nuance should be taken into account. if the hydraulic system is closed, then you will have to adjust the pads manually. for this, special valves are provided.
  • If you have to adjust disc mechanical brakes, you will need to pull the cable according to the above instructions and check the location of the pads. the distance between them and the disc should be within 0.2-0.4 mm.
  • In order to adjust the pads with disc mechanical brakes, you need to use special bolts. by tightening them, you can see how the pad moves. You need to be especially careful when setting the distance between the pad and the disc. 0.3 mm is too small, it is easy to make a mistake.

Be sure to check the operation of the brake system in action after carrying out the work. ride your bike for a few meters and try to brake. If the cable is too tight, or the pads are too close to the disc, then too sharp braking will occur. this is a surprise in which the cyclist begins to move forward, but without his vehicle. Therefore, during a test drive, you need to be extremely careful and careful, if necessary, the disc brake system is adjusted again taking into account previous errors.

Braking system characteristics

The following terms are used to qualitatively describe the operation of rim brakes:

  • impact force;
  • efficiency;
  • wear resistance;
  • modulation;
  • service requirements;
  • comparative features.

The force of impact, or braking, is a parameter that shows how much the brake can clamp the rim so that the bike cannot be moved. Maximum effort is required only to completely stop and lock in place. On the road, the effort is not fully used to adjust the speed. The range of action on the wheel rim by pressing the knob is called modulation, or accuracy, of the brakes.

An active cyclist uses his transport not only in dry and cloudless weather. Rain, mud, sand. everyone who rolls out their bike on long trips will have to face this. The effectiveness of brakes allows you to describe their behavior in a wide variety of conditions.

Durability is a measure of durability, taking into account the prescriptions for the use of the bicycle as a whole. Timely maintenance can increase the service life of the braking system. Service Requirements provide guidance on how to properly install and adjust the machine, how often to do this, and guidance on how to replace parts.

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How to set up rim brakes

Vibrators do not lose popularity. Ease of maintenance, cheap consumables and unpretentious operation. an excellent option for those who use the bike primarily for moving, without extreme and overloading.

The principle of operation is simple. when pressed, the brake lever pulls the cable (G), which moves the brake levers (I), pressing the pads (J) attached to them against the wheel rim. When the handle is released, the levers return to their original position, installed on them by springs. In this article, we will analyze how to set up and adjust rim brakes:

How to install and adjust the V-brake yourself

  • Attach the levers to the bike frame.
  • Insert the drive cable into the brake lever.
  • Install the handle on the steering wheel, insert the cable into the grooves on the frame (if any).
  • Connect the cable to the levers and put the spring.

After installation, you will definitely need to adjust the brakes.

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The accuracy of the mechanism depends largely on its settings. So, even an expensive system will not work well without proper adjustment, and conversely, a mid-range V-brake can outperform a disc brake in terms of efficiency. What needs to be done to adjust the brakes?

Adjust the cable tension. After adjusting, the brake should instantly respond to the squeeze of the handle and rebound when it is released. If the pads do not move away from the rims, this indicates insufficient tension. On a tight cable, the handle will be hard to press, and the sheath may burst.

The tension is adjusted with a bolt on the side of the levers. The setup looks like this:

  • Reset Springs.
  • Loosen the cable fixing bolt.
  • Adjust the tension so that in the fully clamped position, the distance from the handle to the handlebar corresponds to the thickness of the finger.

If damage is noticed on the cable sheath, it is recommended to immediately install a new set.

Clearance adjustment. The optimal distance is 2. 3 mm from the edge of the pad to the rim. Determination of brake pad wear: cannot be used when the diverter grooves are completely erased (the whole surface is flat).

How do I fit new pads? The location relative to the rim affects the size of the contact area of ​​the pads with it, the braking force and the life of the material. For brake pads with soft rubber surfaces, install them with the leading edge closer to the rim. Brake pads made of rigid material are placed strictly parallel to the surface of rotation of the wheel.

If your bike has cartridge pads, you only need to change the pads. Their position is set with a cotter pin; before removing the old surface, it is removed from the body. Similarly, in the reverse order, insert a new pad and fix it with a cotter pin.

Adjustment of the position and displacement of the shoe housings are carried out by means of a bolt and washers. For accurate fixation, you need to squeeze the brake and set the position of the pads strictly on the surface of the rim.

The last step will be to test the operation of the system in practice, that is, in real driving conditions. As a rule, the V-brake setting is obtained immediately. However, if braking is delayed or the handle does not fully return to its original position, the brakes must be readjusted.

Adjusting the rim brakes

Mountain bikes use a v-brake braking system. by its example, we will consider the principles of tuning, as it is also available on other bicycles with rim brakes. The difference can only consist in a different arrangement of bolts and screws that will need to be tightened / tightened.

Note: it is important to observe three main rules:

  • the pads should be parallel to the rim;
  • the gap between the rim and the block should not be more or less than 1 mm;
  • the pads should be symmetrical with respect to each other.

How to achieve these guidelines when adjusting rim brakes on a bicycle:

  • You need to find a hex nut. it fixes the pads. To loosen it and set the brake pads in the desired position, you need to press the brake lever and watch how the shoe touches the rim. By releasing the brake lever, the shoe can be set to the desired position. it moves up, down and at an angle.
  • The distance between the block and the rim of the wheel should not be more than 1 mm, although in some models of bicycles there are also 2-3 mm. exact information about a particular vehicle can be obtained either from the instructions for it, or on the Internet for technical characteristics. It should be noted that braking of the wheel should occur even with the minimum pressing of the brake lever. That is, if the wheel stops only when the brake lever is fully pressed all the way, then this is incorrect.

After carrying out all the specified work, it is imperative to check the operation of the brake system. First, this is done at idle speed. lift the front wheel up, spin it and press the handle sharply, then do the same with the rear wheel. The next step is to test the brake system in action. get on your bike and ride 3-5 meters, braking sharply. If the bike stops even when the brake lever is pressed slightly, then the system has been serviced correctly.

Setting up disc brakes

As a rule, adjustment of disc brakes consists in periodically tightening the cable. But often you have to replace the pads, however, on disc brakes they wear out longer than on rim brakes. First you need to find out which specific disc brakes are installed on the bike. brake pad adjustments for hydraulic and mechanical systems will differ.

Experts recommend taking note of the following points:

  • If there are hydraulic disc brakes on the bike, then replacing the pads may not be necessary. they are able to do it on their own. But one nuance should be taken into account. if the hydraulic system is closed, then you will have to adjust the pads manually. for this, special valves are provided.
  • If you have to adjust disc mechanical brakes, you will need to pull the cable according to the above instructions and check the location of the pads. the distance between them and the disc should be within 0.2-0.4 mm.
  • In order to adjust the pads with disc mechanical brakes, you need to use special bolts. by tightening them, you can see how the pad moves. You need to be especially careful when setting the distance between the pad and the disc. 0.3 mm is too small, it is easy to make a mistake.

After carrying out the work, be sure to check the operation of the brake system in action. ride your bike for a few meters and try to brake. If the cable is too tight, or the pads are too close to the disc, then too sharp braking will occur. this is a surprise in which the cyclist begins to move forward, but without his vehicle. Therefore, when driving for a test, you need to be extremely careful and careful, if necessary, the disc brake system is adjusted again taking into account previous errors.

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Defective brakes

Bad brakes are every cyclist’s problem. I don’t really want to carry out checks before each trip. It is tedious and time consuming. But here’s the problem. it’s necessary. A routine brake check can save lives and health. Adjusting the brakes on a bicycle is a painstaking task. Therefore, it is so important to be able to do it right.

Disc hydraulic brake

So, the winner of the rating. It is hydraulics that rules the world of brakes. How does this system work? There are handles, there is a disc and there are braking elements. They are connected together by rubber tubes, inside of which there is oil, or, as it should be correctly said, brake fluid. What are its pros and cons? The hydraulics are responsive to every pressure. It can be said to instantly transmit pressure. That is why many athletes and extreme sportsmen use hydraulic disc brakes on their bikes. After all, the accurate transmission of sensations helps to win important seconds. The hydraulic brake firmly compresses the metal disc so that, if pressed hard, the rider can fly out of the saddle in the truest sense of the word. But, like everyone else, hydraulics have their negative sides.

First, the high cost. This, of course, is a dubious minus, because this system is bought not by ordinary amateurs, but by professionals. Second, the fix issue. Yes, the hydraulics simply cannot be repaired by yourself. The slightest upset. and a trip to the workshop is assured. And again, repairs will cost a pretty penny. Parts of the system, such as tubes, are not very reliable. If this part bursts, the brake fluid will escape. Therefore, you can only brake with your feet. Adjusting hydraulic brakes on a bicycle is tricky. If possible, it is better to entrust this to the master.

Spring tension

The springs that are part of the mechanical rim brake system are also responsible for the distance between the wheel and the block. But, unlike a nut with a cable, they allow you to adjust the distance down to a millimeter. That is, more precisely. The spring tension can be changed with a single bolt that is screwed on and off every now and then. This bolt is located on both sides of the brake. Therefore, when a situation arises that one side touches the rim, and the other is separated, you just have to turn the bolt. and everything will fall into place. When this element is twisted, the spring becomes firmer. Consequently, the distance will increase. If you unscrew the bolt, the spring will weaken. From this the distance will decrease. So, by adjusting each element, you can achieve perfect accuracy.

Adjusting the brakes on a bicycle

Adjusting the brakes on a bicycle should be carried out regularly. such maintenance will guarantee the safe operation of the vehicle. There are two main types of brakes on modern bicycles. rim and disc brakes, but disc brakes can be mechanical or hydraulic. The type of brake system installed on a particular bike will determine the process of their maintenance.

Disc brakes

Adjusting disc brakes on a bicycle is done with just two screws. The first is responsible for the distance between the disc and the pad. The second is responsible for its location in the vertical plane. Therefore, if the rubber clamps began to constantly touch the brake or, conversely, the disc left the contact area of ​​the pads, you just have to work hard with a screwdriver. Through trial and error, you can understand what is responsible for what, and then it’s a matter of technology. By tightening the screw, you can immediately adjust the position.

Varieties of rim brakes

Rim brakes are divided into several types:

  • tick-borne;
  • cantilevers;
  • V-brake (vector mechanical);
  • hydraulically driven.

Caliper brakes. previously popular modifications, are now rare on the market. They are a classic model of rim brakes with attachment to the fork or stays of the bicycle frame. Design features and operating principle:

  • Consist of a handle, a drive cable, two movable bows and brake pads.
  • The handle is attached to the handlebars of the bicycle, a cable is pulled from it and fixed on the clamping side of the arches. The body itself is attached strictly above the wheel, pads are screwed to the lower mounts of the arcs.
  • Through the cable, the force is directly transmitted to the clamping part of the arcs, due to which they are compressed, and the pads are in contact with the rim.
  • Responsible for unclamping is an elastic metal insert or spring built between the levers.

The levers have a single axis of rotation and move towards each other like pliers pincers. Hence the name. tick-borne. Advantages. ease of installation, simple setup. Cons. weak braking force, low modulation, high abrasion of the pads, require frequent debugging. Fits on road racing bikes and optionally as a front rim brake on road models.

Cantilevers belong to the second type of disappearing brakes. The principle of their work is to extend the levers under the action of a taut leash. The principle of operation of the cantilever brake:

  • Through the main cable, the force is transmitted to the jumper.
  • The cable pulls the jumper up, the leash attached to it is pulled.
  • The leash connects both levers, which are rigidly attached to the frame.
  • Due to the convergence of the levers, the pads approach the rim.

The cantilevers are dirt resistant, will not bump the tire and are easy to install. Significant disadvantages include:

  • decrease in braking force as the leash is pulled;
  • you need to create a high effort to stop the bike completely;
  • difficulty of adjustment.

In justification of the latter, it should be noted that the position of the pads can be adjusted within wide limits.

V-brake is a common type of rim brake on high-speed bicycles. Compared to cantilevers, it has a higher precision and longer shoe longevity. They are also easy to remove and repair yourself.

The vectors are partially similar in design to cantilevers: the front brake levers are bolted to the fork, the rear brake levers are attached to the upper stays. The legs are connected to each other by a pulling cable. The drive cable is brought to one side, but due to the straight shape of the tie, the forces are equally transmitted to both levers.

Hydraulic bicycle rim brakes are a more advanced mechanical model. The drive system consists of a control cylinder, a hydraulic line and power cylinders. The forces from the handle are transmitted to the master cylinder, which, through the oil, acts on the power cylinders. Those, in turn, move the pads towards each other.

Advantages. high compression force and efficiency, excellent modulation. Disadvantages. deterioration of work with a blockage of the hydraulic line, complex repairs. Used a similar type of brakes for freeride and trial.

Rim-type brakes have low brake pad travel, which means they wear less during operation. A significant disadvantage of this approach is the inability to be used on wheels, even with minor rim curvatures. Sensitive brakes will rub against the wheel on the fly, causing reduced speed and increased pad wear.