How to remove rim brakes from a bike

Replacing rim brake pads on a bicycle

Over time, rim pads (like any other bike part) fail. And any self-respecting bike enthusiast, not to mention professionals, should be able to replace them. over, this is easy to do with v-brakes. The main thing is to do everything slowly, clearly observing the technological stages in the required sequence:

  • Open the brake. bring its levers together and remove the iron tip of the shirt from the formed groove (the cable comes out of it).
  • Remove old pads, remembering in which sequence the fasteners were used.
  • Install new pads, sequentially collecting all mounting shims and washers.

It’s even easier when it comes to cartridge pads! It is only necessary to replace the rubber gaskets. remove the locking pin, remove the old one and put a new gasket, and then secure it with the same (or new) split pin.

Care must be taken when changing v-brake pads as they can be left or right (the markings are directly on the pads). Then they should never be confused.

In addition, it is not enough just to change the pads, you also need to adjust them. And before that, check the brake cable for wear or breakage. It should be completely intact and easily move around in a shirt. It is also necessary to check the shape of the wheels so that there are no eights.

The brake pads must be properly pressed against the wheel rim. And the pressure can be adjusted (configured) with the shoe mount. It is not difficult to get the desired angle if you hold down the brake and loosen the nut on each of the pads.

The v-brake cartridge pads should be located strictly horizontally, touching their entire surface to the rim, but not touching the tire. And when the required position is reached, you should fix it with a shoe nut. Regarding conventional brake pads, the rear of the pads must first come into contact with the rim horizontally.

During the tuning process, it is also necessary to ensure that the brake levers come together equally. Position adjustment is possible with a Phillips spring tension screw. If the lever barely moves, then the screw should be tightened, and when the lever moves too easily, unscrew.

Disc brakes

A bicycle disc brake is a combination of a steel disc (rotor) located on a hub with a caliper. a device that actually clamps the disc with the brake pads. From the brake lever on the handlebar, the force is transmitted to the brake by a cable (mechanical disc brake type) or through a hydraulic mowing line (hydraulic disc brakes).

remove, brakes, bike

Bicycle disc brakes also have their advantages. They are:

  • less clogging when driving;
  • can work without problems while driving on snow or mud;
  • as smoothly as possible (in contrast to rims) adjust the braking force;
  • do not react to slightly curved wheel geometry (small eights for them are not an obstacle);
  • do not affect the wear of the rim;
  • and do not require expensive maintenance.

Many bicycle disc brakes have only one moveable brake pad. The second is fixed statically relative to the frame structure. This greatly simplifies and reduces the cost of the caliper. But, however, as the wear and tear, the cyclist will have to tighten the brake pad, which is stationary.

Brake discs are standard sizes. These are 140, 160, 180, 185, 203 or 220 millimeters.

Bicycle brakes

It is the bicycle brakes that are responsible for regulating the driving speed of a two-wheeled vehicle and, in particular, for slowing down the speed of movement, as well as stopping. They can be of several types:

Bicycle brake quick releases

The most common ones used in most modern bike models are disc brakes and rim brakes.

Rim brakes

The operating principle of rim brakes is extremely simple. On the bicycle handlebar there is a brake lever, from which a special cable (or a hydraulic line is laid) is pulled to the brake pads located on both sides of the bicycle wheel rim. When the handle is pressed, the rim is compressed by the pads, after which the wheel rotation slows down and comes to naught.

There are two types of rim brakes, which in turn are subdivided into several subtypes:

  • Mechanical brakes including:
  • vector (V-brake or vibrake) with V-shaped attachment of the levers to the brake pads;
  • tick-borne (crabs) with U-shaped levers;
  • and cantilever (obsolete predecessors of V-brakes).
  • Hydraulic brakes, in which the applied force is transmitted from the handle to the pads by brake fluid along a specially laid hydraulic mowing line.

Rim brakes have a number of clear advantages over other types of bicycle brakes:

  • Low loads on bushings and spokes.
  • Less braking heat.
  • Easy setup even in the field.
  • Low weight of the actual brake.
  • Not a high price at all.

Replacing brake pads on a bicycle

Both avid cyclists and novice amateurs have to deal with the need to replace brake pads on bicycle transport. And practice shows that the more you pedal, the more often you should change the brake pads.

Replacing disc brake pads

There is a step-by-step guide to replacing worn-out disc brake pads:

  • First you need to remove the caliper and clean it if necessary.
  • Then remove the retaining ring or wiring so that the bolt does not unscrew.
  • Remove the boot (twist-on or snap-on, depending on the model). And if the bolt is dirty, then it must also be cleaned.
  • Remove old bicycle brake pads. Sometimes they can be easily removed, and in some models they need to be pryed off-tucked a little, freeing them from the L-shaped protruding grip.
  • Install new (organic or semi-metallic) pads. They should slide along the rotor, and the spring should not break out of its place.
  • Install the bolt, followed by the caliper. To check, you need to press the brake lever several times well. And make sure that the pads have settled correctly and correctly press the rotor.

Disc brake pads should be replaced if:

  • decreased braking force;
  • a brake squeal is heard;
  • or an unpleasant grinding noise is heard when the brake lever is pressed.

Riding a bicycle with worn disc brake pads is unsafe. In addition, the rotor (the steel brake disc itself) may fail. And this will already require serious bicycle repairs.

You will see step-by-step instructions for replacing brake pads on a bicycle with disc brakes in this video review:

Adjusting disc brakes

First of all, it is worth checking if the rotor is damaged. If there are chips and bursting areas on it, then no adjustment will help. the brakes will still not work correctly. In case of a damaged rotor, it will need to be replaced.

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As for the types of disc brakes, they are mechanical and hydraulic. The latter are mainly put on high-end bikes, because they cost a lot. The only difference between setting up disc hydraulics and mechanics is working with brake fluid. Before winter, for example, it will need to be drained a little. This will help increase pad free play.

In disc brakes, it is most often required to adjust the angle of pressing the pads against the rotor. Do not forget that first of all they must be strictly parallel to each other.

So, the brake pads on disc brakes are located in the caliper. this is a special device that is attached to the frame and on the bike fork using an adapter. Follow the steps below to adjust the caliper and pads.

  • Take the wheel and secure it in the position that you will use directly for driving.
  • Next, you need to see how the caliper works, for this you need to loosen the screws fixing it a little.
  • Now you need to push the brake lever to see how the caliper moves and returns to its place. Also don’t forget to check the clearances.
  • Then it remains to tighten the machine, and fasten the screws one by one. that’s the whole setting.

Also, when adjusting disc brakes, you may need to adjust the length of the fixing cables. This is done in the same way as with rim brakes. The mount is untwisted, then the cable is released, shortened or lengthened, the mount is screwed back.

Adjusting the brakes on a bicycle

You suspect a malfunction of the brakes on the bike, strange sounds arose during braking and when you press the handle, the stopping mechanism does not work at all or works slowly, which means there is a need to adjust and adjust the system.

  • You need to start with the handle: when it is fully pressed, it should not reach the fingers of the hand, if, on the contrary, then you need to adjust with the lock nut.
  • After we assess the backlash between the disc and the pads. you can put a light sheet of paper for a more visual adjustment, release the screws that attach the brake to the fork or adapter.
  • Next, loosen the screws for free wheeling of the brake.
  • As a result, the caliper has become a movable structure. Now you need to push the brake lever so that the pads are pressed against the rotor. In this position, the caliper is centered.
  • Finally, attach the connecting screws to the adapter or plug. We carry out clearly alternately, screwing the screws in the same way, by 1/4 circle. Then the handle can be loosened.
  • Only if the caliper device is reliable, the handle is working properly, there is no distortion of the rotor design, as well as worn pads, all the previous recommendations for adjusting the disc brake on a bike will give a result.

Rim brakes

This is the most popular type of brake today. Their principle of operation is as follows: when a force is applied, which is transmitted through a cable to the brake levers, the brake pads on the brake levers fit tightly to the wheel rim, which ensures braking. Rim brakes are available in cantilever, caliper and V-brakes.

Step. determine the type of brakes

The type of brakes fitted to your bike depends primarily on your riding style. Let’s figure it out with clear examples.

  • Foot. They are installed on the simplest city models, and on almost all walking bike models, for example, cruisers. Such brakes are very simple in structure, effective and reliable. In addition, and most surprisingly, the foot brakes do not need to be adjusted at all. They have one peculiarity: the longer you use them, the more force you need to apply for effective braking. This, by and large, is the only problem that can arise with such brakes, and it is solved by replacing the internal pads. This should be done by the master, it is not recommended to disassemble the brakes himself. there is a risk of wasting time, and gaining a lot of nerves, after which you still have to contact the master.
  • Rim. They are used on walking bikes, city bikes, road bikes, road bikes, mountain bikes and even jumping bikes. They are very simple in design, efficient, reliable, and most importantly, they weigh little. That is, despite insignificant obsolescence, rim brakes continue to be used all over the world. Their only drawback is that with prolonged use, the wheel rim is depleted, which leads to its destruction. Disc brakes look like this: two handlebars on the steering wheel that receive pressure, a system of cables, and two small mechanisms with pads on each wheel. force is imparted to them, after which an effective action takes place, that is, braking.
  • Disc brakes. The most progressive of all the varieties that exist today, they are superior to rims in everything, with the exception of two parameters. they weigh more, and require the installation of a special rotor on the drum, which makes it impossible to install, for example, a trunk. In general, disc brakes are the most effective and are used by professional riders to maximize ride control. Therefore, it is disc brakes that are installed on high-level mountain bikes, as well as on bicycles for extreme riding. it is no longer possible to come up with something more effective. Due to braking through the rotor, the wheel rim does not suffer at all, and the very condition of the wheel does not in the least affect the braking. The last disadvantage of disc brakes is that they require powerful spokes from the bike, because the braking force is transmitted from the rotor through the spokes to the wheel.

Within the framework of a specific article, we will talk about rim and disc brakes. these are the most common types, and besides, they really need regular adjustment, which cannot be said about the foot brake. But before that, we’ll figure out how to tell if the brakes on your bike really need tuning.

Cantilever brakes

Their mechanism consists of two levers with brake pads attached to the pivots on the fork. With the help of a pair of rods, the cable moves the levers, after which braking occurs. This mechanism is simple and reliable, but it is less and less common. It is superseded by other other types of brakes with more effective stopping power.

V-brake adjustment

Anyone who is a little versed in the design is able to do the adjustment of the v-brake, because it is rather uncomplicated. The main rule is the synchronous placement of the stopper pads in relation to the wheel rim: they must both be at the same distance relative to the rim, and the gap between the bicycle wheel frame and the pads cannot exceed 1 mm. In fact, the basic principle of v-brake adjustment is demonstrated in setting even distribution of pads and cable tension:

  • Adjusting the position of the shoes. In order to adjust the brake, you need to loosen the fixing nuts, which will return the pads to maneuverability and make it possible to move them in the required direction. The main aspect is that the pads must be installed strictly at the level of the rim, and the gap between the pads and the rim must be one-to-one on both sides.
  • The so-called light check. The simultaneous arrangement of the pads should be maintained both when the handle is clamped and released. The gap between the right and left pads is allowed in the range of one to three millimeters depending on your bike and should be symmetrical.
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It is permissible to check the tension of the cable by tightening the figured screw on the rudder handle. We screw in the rod, set the wheel in a rotational motion, while pressing the handle, the brakes should work. If this does not happen, then the length of the cable is incorrect.

Most often, it is deliberately set longer, which makes it possible to tighten or release the cable tension by loosening the fixing bolt. After finishing the adjustment, we tighten the bolt back. After all the settings, tighten the fixing screws.

This brake is as simple as the bike itself: roughly speaking, these are two levers each with rubber pads, attached to the stays of the fork and the rear triangle, converging under the action of a cable, which in turn is selected by a handle on the handlebar.

The system is as simple as it is effective. Such a mechanism practically cannot break and can be easily adjusted. There are several types of rim brakes:

The brake cable is routed from the side to the top of the brake arm. The brake lever compresses both parts of the brake with cartridge brake pads. This system of parallel pad pressing allows for efficient braking. In addition, the cartridge brake pads can be easily changed using a conventional hex wrench. At the moment, this type of brake is the most common. It is used on almost all types of bicycles.

Most often used on road bikes, but there they are gradually being replaced by other types of brakes. The name of the brakes speaks volumes about its design: the brake pads are pressed against the rim by curved levers that resemble pliers.

Their mechanism consists of two levers with brake pads attached to the pivots on the fork. With the help of a pair of rods, the cable moves the levers, after which braking occurs. This mechanism is simple and reliable, but it is less and less common. It is superseded by other other types of brakes with more effective stopping power.

Since V-brakes are the most common type of rim brakes, it is worth considering their advantages and disadvantages separately.

  • Simple and efficient design
  • Lightweight compared to disc or drum brakes.
  • Low price.
  • Low load on spokes and hub.
  • Heat less than disc brakes.
  • Setting is very simple, affordable, can be done in the field.
  • Deterioration of work in mud and wet weather, this leads to dangerous situations.
  • If the rim is crooked (figure eight), the brakes will cling to it.
  • Brake pads require relatively frequent replacement.
  • Cannot fit on many frames and forks.
  • Faster rim wear. This disadvantage is important for mountain and other extreme bicycles, for city bikes it is insignificant.
  • erasure of pads and rims, heating with prolonged braking.
  • Very wide tires cannot be used with V-brakes.

Why are these reliable brakes being gradually replaced by disc brakes, even in the budget bike niche? Let’s see.

A disc brake is a combination of a steel disc located on the hub of a bicycle wheel, usually on the left side, and a device that compresses this disc with brake pads. a caliper. Disc brakes are divided into 2 types:

  • Mechanical. The braking force is transmitted by a cable in the jacket.
  • Hydraulic. The braking force is transmitted by the fluid through the hydraulic line.

The brake disc (rotor) is attached to the wheel hub, and the brake machine (caliper), inside which the brake pads are located. Disc rotors come in several sizes: 140, 160, 180, 185, 203 and 220 mm. The larger the rotor diameter, the more efficiently the brake works, as the arm of the brake force lever increases.

  • the efforts from the handle are transmitted to the cable;
  • the cable is pulled up;
  • the brake pad moves in the caliper;
  • under the action of the return spring, it bounces off the disc when the lever is loosened.
  • a reservoir with brake fluid or oil;
  • hydroline;
  • leading drive cylinder;
  • brake pistons.

Brake pads can be filled with metal filings or organic material. Metal-filled pads last for a long time and are more resistant to wear. Organic pads are softer, wear in quickly and provide smoother braking.

In many mechanical disc brakes, only one pad is movable, while the other is fixed to the frame. This allows to simplify and reduce the cost of the caliper, but leads to the need to tighten the fixed pad as wear occurs. Both pads move in hydraulic brakes.

  • Disc brakes are less clogged when driving, as they are located closer to the center of the wheel, they work in mud, on snow.
  • Allows you to more smoothly regulate the braking force than rim. In other words, they have better modulation.
  • Provides more powerful braking than V-brakes.
  • Can be used with slightly curved wheel geometry, eights do not affect brake performance.
  • Disc brakes rarely require service.
  • Do not wear out the rim.
  • Allows the use of wide tires.
  • Long pad life.
  • Bent rotor alignment is easier on them than on hydraulic disc brakes.
  • Can be used in harsh environments.

Choice between mechanical and hydraulic disc brakes

Mechanical disc brakes are cheaper and simpler, so they are suitable for those who choose a budget bike model.

Hydraulic brakes require a specialized workshop for the repair of the hydraulic line, bleeding, replacement of components. It makes sense to take them when the workshop is nearby in order to turn there for help.

Hydraulics are best used in particularly harsh conditions where power, accuracy and braking speed are at the forefront.

If the budget allows. take hydraulics, the sensations of high-quality braking are difficult to describe in words, very positive emotions!

The brake mechanism is located in the rear wheel hub, while the hub itself or its special part is a drum, and the brake pads inside, when braking, expand and clamp the brake drum.

They can be both manual and foot operated. Nowadays, hand drum brakes are practically supplanted due to their large mass and whimsicality; foot drum brakes are still used in road and city bikes with one gear or planetary gearshift.

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How to Remove Front Wheel from Your Bicycle. Rim brake with standard Quick Release

  • Low-maintenance and unpretentious. Service is quite rare, although it requires a certain skill.
  • Braking resistant to water, mud, snow, oil and weather conditions.
  • No rim wear.
  • It is possible to drive with a curved wheel geometry (figure eight).
  • Are heavy.
  • force is required to brake than with other types of brakes.
  • Cannot be used on multi-speed bikes.
  • The presence of a dead zone. when it is impossible to brake with the vertical position of the connecting rods.
  • There is a risk. if the chain falls off the sprocket and the front brake is not installed on the bike, the bike cannot be stopped.
  • It takes time for the transition from moving forward to the beginning of braking, which in some cases can be critical.

Roller brakes (roller, cam), in fact, are drum (but not shoe) brakes, but they have a slightly different principle of pressing the shoe-rollers to the drum.

Schematically, the mechanism is the same design as the inner (sub-shoe) cam mechanism of a drum drum brake; or the roller clutch of the freewheel clutch turned against the main direction of rotation.

  • Powerful.
  • Complete independence from dust, mud, water and snow.
  • No rim wear.
  • Possibility of long-term operation without adjustments and settings.
  • Can be driven with curved wheel geometry.
  • Large mass.
  • High price.
  • Cannot fit on some shock mounts.
  • It is possible to spin the wheel backward when the brake is applied.
  • Poorly distributed (including in Russia). Hence the difficulty in acquiring.

Alignment of the hydraulic braking system

A pretext for repairing or adjusting a bicycle with disc brakes may be wheel spinning resistance and foreign noises when the brake lever is pressed. How to properly adjust disc brakes on a bicycle?

  • It is necessary to loosen the screws on the caliper until they move freely, then squeeze the handle, while the pads must lean tightly against the hydraulic rotor.
  • At the same time, we check the gap of the hydraulic valves on the hubs, which should be parallel and be at the same distance from the rotor.
  • In the position of the pressed handle, tighten all the bolts on the caliper.
  • To check the operation of the device, it is necessary to release the handle and visually fix the backlash between the furry and the disk, which may not be larger than a hair.
  • In the case of irregular installation of the caliper, it is necessary to release and tighten the tightening of riveted cylindrical rods that have a screw thread on the surface of the caliper itself.
  • At the end of the adjustment, it is necessary to set the brake lever in the optimal position, while using the adjusting hexagon.

What our service center offers

The workshop is equipped with all the necessary equipment and tools to solve the most difficult and painstaking tasks. These include repairing bicycle disc brakes, which involves:

  • burning through oil-stained pads;
  • elimination of oil leakage;
  • complete replacement of the hydraulic line;
  • brake lever stroke adjustment;
  • alignment of the rotor;
  • setting the correct position of the caliper.

And also many other things that could cause incorrect operation or complete failure of your brakes! Servicing the brake pads of a bicycle or changing the fluid in the hydraulics is one of the most difficult and expensive procedures, since the provision of these services requires a lot of time.

If your bike was purchased from us, then you automatically become the owner of a one-year warranty. This means that the first maintenance of the hydraulic brake or any other is absolutely free.

Our company strongly discourages riding a bike with weak brakes, otherwise the risk of accidents increases. If you are not sure of the correctness of their work, it is better to play it safe. Come to the workshop for maintenance!

Monitor your bike regularly and it will serve you for years to come!

V-brake setting

Rim brakes have a very simple principle of operation. two brake pads installed opposite each other and parallel to the wheel, and between them a rim. Pressing the brake lever, the force is transmitted through the system of cables and shirts to the brake levers, which press the pads against the wheel rim, stopping it.

For smooth operation of the rim brakes, you need to monitor the integrity of the cable and the absence of “eights” on the wheel. If at least one fiber breaks on the cable, it must be replaced. The cable should move freely in the shirt and if it gets stuck it is necessary to change either the cable or the shirt.

The main thing in the high-quality operation of rim brakes is the high-quality pressing of the pads to the rim. This can be adjusted by fastening the pads. The fastener consists of a set of washers, gaskets and a nut, it allows you to fix the shoe at the desired angle.

To adjust, loosen the nut on each shoe slightly so that the shoe can be moved with your fingers, but it will not move. Place the block parallel to the wheel rim, note that it must not touch the tire (the distance between the block and the tire must be at least 1 mm.).

  • If you have soft rubber brake pads, they will deform when braking. Therefore, they must be installed so that the leading edge of these pads is 1 mm. closer to the rim than the rear. To do this, place a 1-1.5 mm thick gasket under the rear parts of the pads before adjusting. For example, a piece of rubber cut from a worn bicycle tube.
  • If you have brake pads with a rigid base that do not deform when braking, you must install strictly parallel to the rim.

Then firmly press the brake lever and tighten the nuts on the pads, carefully watch that they do not change their position at the same time.

Then look at the brake levers. Squeeze and release the brake levers several times, the levers should converge and diverge equally. This can be adjusted with the spring tension screws located at the base of the lever. We turn the adjusting screw on the lever that deflects too little, and unscrew it if the lever deflects too much.

In order to remove the wheel, you do not need to unscrew the brake cable, you just need to release it from the clamp. To do this, squeeze the brake levers with your hands and remove the rigid part of the cable jacket from the slot.