System check before the procedure
Make sure the adapter is securely attached to the bike frame before adjusting. Examine the rotor. Normally, the part is smooth, tightly screwed to the sleeve. Check the element for deformation. To do this, lay it on a flat surface. A loose fit indicates a need for alignment. Wheels must be screwed tight.
If a mechanical braking system is installed, it will be necessary to check the condition of the jackets and cables. Replace loose cables with torn fibers. Cracks or tears on the shirt are also a reason for replacement.
Hydraulic brakes require a hydraulic line check. If leaks or damage are found, it is recommended to replace the element. Should be changed even with minor breakdowns.
Inspect every element of the system. If any is found to be in poor condition, damaged, replace it. Carry out these inspections on a regular basis in order to replace worn parts in a timely manner. If you ignore this procedure, driving becomes dangerous.
Oil and dirt gradually build up on the rotor and brake pads. Please remove them before configuring. It is recommended that you wipe the parts regularly as dirt can cause breakage. The elements should be wiped with sandpaper. Don’t rub aggressively. It is enough to get rid of the thin layer. When the procedure is completed, avoid touching the treated parts with your fingers or greasy compounds.
Determine if the rear wheel has been installed correctly. It is normally located at right angles to the surface, does not warp. Place the vehicle on the wheels, slightly loosen the eccentric, push down on the saddle and tighten the eccentric.
Adjustment of disc brakes will be required when unpleasant sounds, squeaks, grinding, or when there is strong wheel resistance when driving.
Remove the caliper bolts. After that, squeeze the handle as much as possible to press the pads against the wheel. Consider the position of the valves. Parts must be at the same distance from the rotor. If the gaps are uneven, press down 1 element, then work with the handle 10 times. In this case, the unevenness should disappear. Tighten all screws. When the caliper is locked, lower the handle. In this case, the block should not press against the rim. The clearance to the stationary part is normally about 1 mm.
The adjustment is completed by setting the handle to the required position. To fix the part, a special hexagon is used.
How to set up disc brakes on a bicycle?
How to set up disc brakes on a bicycle is something that many novice riders do not know. Technologically, such parts are more advanced than the V-brake, thanks to which they perform their functions better. However, you shouldn’t buy low-quality cheap parts.
Adjusting bike brakes
Each option has its own adjustment features. If in doubt about your abilities, contact the service center to specialists.
The adjustment is carried out if there is friction between the disc and the pad. A procedure will also be required in case of deterioration in the work of the part.
The brake lever is squeezed to the limit. Unscrew the locknut of the machine, then turn the regulator out. It may be necessary to loosen the cable. In cases where the brakes are installed crookedly, it is necessary to loosen the adjusting screws. Unscrew the screws securing the braking device. When the caliper becomes movable, squeeze the handle to the limit and lock in a given position. Center the machine on the disc. Then you need to tighten the screws securing the machine. Repeat the procedure periodically to avoid movement of parts.
After completing the process, lower the handle. To avoid permanent shifts, follow the recommendations given in the operating instructions.
When the work is finished, check how the brakes work. It is not necessary to go far. it is better to check in front of the house or service center. If the parts function well, the job is done. If problems are found, re-inspect the bike, try troubleshooting.
How to set up disc brakes on a bicycle?
The braking system on a bicycle is the most important component of every bike, since such a design provides not only comfort of movement, but also helps to avoid all kinds of injuries. In some cases, brakes can even save a person’s life.
There are two main types of braking systems currently marketed by bicycle manufacturers: mechanical (cable) and hydraulic. Each of the presented designs has its own characteristics, advantages and disadvantages, as well as the device.
The main components of the disc brake system parts:
Correctly assembled and adjusted bicycle braking system will provide an opportunity to achieve high comfort and safety while riding. That is why it is extremely important to approach the issue of setting the brake with great responsibility.
Main Steps for Hydraulic Brake Adjustment
Before talking about adjusting the hydraulic brake, the advantages of this design should be noted: high supervision of the braking process, with wear of the pads there is no need for continuous adjustment of the system.
Adjustment involves the implementation of several measures that will make it possible to correctly and effectively adjust the operation of the brake structure. To do this, you should:
loosen the caliper bolts so that it can move freely and without any effort (when you press the brake lever);
hold down the handle of the brake system with effort (to achieve the desired result, you can press a couple of times);
make sure that the caliper is secured well enough when pressed, and then continue to hold the brake system handle clamped (during this, tighten the caliper bolts evenly).
After completing the above steps, you will need to check the functionality of the hydraulic brake system. If everything is done correctly, the brake disc will not touch the caliper, and the distance to the installed pads should be at a minimum value. This will create conditions for quick and effective brake operation.
Installing a disc brake system: basic steps
Before you start adjusting the brake system, which has already been in operation for some time, it is necessary to carry out preparatory work. inspection of components and parts. After that, you can start setting up the system (below are the main steps of a mechanical and hydraulic disc brake).
Key advantages of a disc brake over drum options:
Our experts, if necessary, will consult each visitor of our Internet resource, comprehensively and competently answering all the questions posed. This will make it possible to competently and quickly carry out all the necessary actions aimed at setting up and adjusting the bicycle disc brake system.
The main steps for adjusting a mechanical brake are:
unscrewing the bolt that fixes the brake cable in order to remove the tension;
loosening the bolts fixing the caliper (there is no need to unscrew very much, since it is enough to achieve the ability to slightly change the position);
tightening the bolt that pushes the stationary brake element (in the process, you need to find contact with the disc, but you should not press hard on it);
pressing the brake by hand (when performing this action, the brake must be kept pressed against the disc, and then the bolts must be tightened);
opening a few turns bolt of the movable shoe.
Upon completion of these steps, it is necessary to check the performance of the bicycle brake system. It is necessary to spin the wheel, during which it will be clear if the disc is rubbing against the wheel. In the event that everything is fine, you will need to tighten the brake cable, which will make it possible to check the effectiveness of the brakes.
How disc brakes work on a bicycle
The operation and device of a disc brake on a bicycle is based on the transfer of force from the handle to the pads, during which it is pressed against the rotor, which is placed on the wheel hub. This contributes to more reliable and predictable behavior of the bike in bad weather conditions, as well as movement in snow or mud.
Check the pads
We remove the brake pads. To do this, we find the extension on the caliper and turn each block in turn by the tongue. If everything is done correctly, then it will not be difficult to dismantle them. Next, we make a visual inspection of the surface for chips. In case of severe damage or wear, the pad should be replaced.
How to set up and adjust disc brakes on a bicycle
Many riders, first encountering hydraulic or mechanical disc brakes on a bicycle, do not know how to properly set, adjust or replace consumables. Many consider their design to be much more complex than V-brakes. but it is not so. Technologically, good bicycle disc brakes, especially if they are hydraulic, are more advanced than v-breaks and do a much better job, but remember that this is not the case for cheap mechanics. Next, we will look at how to properly install and adjust disc brakes yourself at home. But we will start with the design features and differences between disc mechanics and hydraulics. And then we will touch on all of the above points.
How to set up mechanical disc brakes on a bicycle
Adjustment of the disc mechanics is required to be done: after installing new pads, cable, rotor or other brake components; in the case when the rotor rubs against the pads; when it is necessary to eliminate the long travel of the brake lever, etc.
- We check the tightness of the bolted joints at the points of attachment of the adapter to the frame and the rotor to the bushing.
- Loosen the lock nut and tighten the cable tension adjustment on the handlebar until it stops minus 1-1.5 turns. Then tighten the lock nut. We do the same on the adjustment, which is located on the caliper. Next, unscrew the cable retainer, and, pulling the cable by hand, tighten the retainer bolt back. (If you have already done these operations when installing a new brake, then you do not need to repeat these steps).
- We loosen the bolts that attach the machine to the adapter (for an easier setup, you can remove it completely).
- We adjust the position of the fixed (static) and movable shoe. The purpose of this procedure is to achieve an equidistant position of the pads from the center of the caliper slot so that the rotor can fit between them with minimal clearances. To adjust the fixed shoe, loosen the locknut (if any), and rotate the bolt that adjusts its position. To adjust the movable one. rotate the cable tension adjustment on the caliper. After the distance is set, tighten the static block retainer. If for this procedure you removed the machine, then you should install it in place, but do not tighten the mounting bolts.
- We set the correct position of the caliper relative to the brake disc. To do this, the bolts that attach it to the adapter must be loosened so that it can walk relatively easily left and right. We press the brake lever all the way and fix it with electrical tape, wire, rope or other improvised means. Next, slightly wiggling the caliper with your hand, screw it to the adapter, alternately tightening the bolts.
- After performing the above operations, in 80% of cases the rotor will shuffle against the deck (s). We determine which of them it clings, and adjust the distance by adjusting the cable tension on the caliper (in the case of friction against the movable block) or by rotating the bolt (if rubbing against the static one). The clearance on both sides should be minimal, at which the rotor does not touch the pads.
You can watch a detailed process of setting up disc mechanical brakes in this video.
There are cases that after adjusting the mechanical disc brakes of a bicycle, the rotor strikes against the pads in one (or several) places. This suggests that you have it slightly deformed. In this case, you need to align it. This can be done directly on the bike without removing the rotor. Determine the place where it touches the pads by slowly rotating the wheel. Pay attention to which side the rotor is deformed. Then, we turn this section so that access appears to it, and we bend it in the opposite direction from the place of friction. Be careful not to make things worse. Do not apply too much pressure to the rotor. It is better to repeat this operation several times, gradually adding pressure.
How to adjust hydraulic disc brakes
Although hydraulic brakes are called self-adjusting brakes, it is sometimes possible to notice a rustle or squeak that they emit during the braking process. In this case, adjust the disc hydraulics of the bike. Also, a similar procedure is necessary on a new bike if the brakes were set incorrectly from the factory.
- Slightly unscrew the bolts that fix the caliper to the adapter.
- We clamp the brake lever and fix it with electrical tape, rope or other improvised material.
- We make sure that the rotor is clearly in the middle of the caliper slot, and the brake pads are extended equally on both sides. If this is not the case, then you can set its position by slightly pressing on the rotor from the desired side. Due to pressure, the brake fluid will be evenly redistributed between the pistons.
- After that, we tighten the mounting bolts and remove the electrical tape from the brake lever.
After you have adjusted the hydraulic disc brakes, turn the wheel and check for friction. If you observe intermittent shuffling, then this is a signal that your rotor is slightly bent. To eliminate this malfunction, it is necessary to determine the place of friction, and on which side of the pads the rotor clings. Then rotate the rubbing area 180 degrees from the caliper and gently push in the opposite direction. This should be done very carefully in several passes, with each of which add force until the friction disappears completely.
Setting up hydraulic disc brakes is shown in the video below.
Check the correct installation of the wheel
Determine if the wheel is installed correctly. It should be clearly perpendicular to the ground, without tilting to the side. To do this, we put the bike on the wheels, loosen the eccentric and, pressing the saddle with your hand (keeping the bike level), tighten the eccentric.
Disc Hydraulic Bicycle Brakes
Disc hydraulics are very similar to their mechanical counterparts. The main difference is that the force applied to the brake lever is transferred to the pads not with a cable, but thanks to DOT4 brake fluid (on Avid, Hayes, Helix brakes) or mineral oil (on Shimano brakes). Next, consider the design of hydraulic disc brakes.
- Brake handle. Actuates a piston that presses on the brake fluid.
- Brake lever adjuster. As with disc mechanics, it is designed to adjust the position of the handle relative to the steering wheel.
- Master cylinder. It consists of several parts. An expansion tank with a lid serves as a storage for the brake fluid. The cap is used when filling and bleeding the brakes. Inside there is also a piston with a cuff and a return spring.
- Hydroline. It is a durable hose that connects the master cylinder and the caliper.
- Caliper. A mechanism that, when pressure appears in the hydraulic line, activates the pistons that push the brake pads.
- Brake pads. Used to convert frictional force into thermal energy, thereby stopping the bike.
- Adapter. The part that attaches the brake caliper to the fork or bike frame.
- Rotor. It is a perforated metal disc, against which, when the handle is pressed, the pads rub.
Mechanical drive and brake settings
To set up a mechanical (cable) bicycle disc brake, you need to make sure that the main components. cable, pads, caliper and rotor. are installed correctly and in good working order. You cannot use a bike if:
- there are damage to the cable, broken threads, weaving disorders, loose ends;
- the rotor is deformed, the distance between it and the pads is uneven when the wheel rotates;
- there is a backlash of the adapter and caliper.
To adjust, it is necessary to tighten the cable on the handle (-1.5 turns) and, using the calibration screws on the caliper, achieve the minimum distance between the pads and the brake rotor. It is inadmissible to touch parts when the handle is released.
Installation of a disc brake with different types of drive
To install a mechanical disc brake on a bicycle, you first need to fix the handle on the handlebar with a clamp, then pull the cable and fix it in the handle. Caliper assembly with pads is mounted to the frame using an adapter and connected to the handle with a cable.
Installation of a hydraulic brake on a bicycle practically does not differ in actions, since the role of a transmitting cable is performed by a hydraulic line with a working fluid. The master cylinder acts as a hydraulic reducer and a bypass valve that creates excess pressure when the handle is clamped. Pad travel is provided by a piston mounted in the caliper assembly. The system begins to work correctly after the final adjustment, which will be discussed separately.
How to properly set up disc brakes on a bicycle?
Bicycle disc brakes are not always included, but you can purchase and install this device yourself. There are two basic schemes for implementing this useful improvement. the brake can be mechanical (cable) and hydraulic.
The principle of operation and the device of bicycle disc brakes
According to the principle of operation and design, a disc bicycle brake is a system for transmitting force from the handle to the pads, which are pressed against the rotor mounted on the wheel hub. This transfers the braking force from the rim to the rotor, which contributes to more efficient and predictable bike behavior in rain, mud or snow.
The braking system consists of several components:
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- brake lever on the handlebars of the bicycle;
- power transmission drive. cable or hydraulic master cylinder with hydraulic line;
- caliper. a device that provides pad travel depending on the drive force;
- adapter. a means of attaching the brake unit to the bike frame.
The pads and the rotor are in direct contact with each other, providing braking depending on the force transmitted by the drive.
Bike brake hydraulic drive settings
Adjusting a hydraulic bicycle brake differs from adjusting mechanics in that the handle is locked in a clamped position so that the fluid in the master cylinder passes through the channels and reaches hydrostatic equilibrium. After that, the handle is released and the minimum distance between the pads and the rotor is set. After installation, it is important to make sure that there are no leaks of working fluid in the hydraulic system, no deformation of the rotor, more backlash than indicated by the manufacturer. The large distance between the rotor and the pads has the effect of increasing the free stroke of the piston, which can lead to slower brake response. In case of characteristic jerks during braking, check the wear of the pads and the deformation of the rotor.
Disc brake installation features
The most common type of braking system on a modern bicycle is disc brakes. Unlike classic rims, they have their own configuration features. A disc is installed on the wheel in the area of the hub, pressed on both sides by pads. The time it takes for a sharp braking directly depends on the strength and speed of this clamping.
Most often, this type of braking system can be found on mountain bikes. The fact is that disc brakes are very effective in difficult rough terrain and high speeds.
In order to install disc brakes on a bicycle, you can go to any bike workshop, or carry out this process yourself.
In what cases it may be necessary to replace the disc brake:
- A certain element has flown in your brake system that needs to be replaced
- The entire braking system has fallen into disrepair, and you replace it with a new one
- Your bike had a different brake system, but you decided to replace it with a disc
This type of braking system includes:
- A pen
- Brake line
Modern disc brakes are divided into several subtypes:
what the braking system consists of
Before installing such a braking system on your bike, be clear about your future ride, as it directly affects the size and configuration of the brakes. If you prefer to ride on steep mountainous terrain, it is better to opt for large-diameter brakes; small structures are quite suitable for short walks in the metropolis.
In order to install a disc brake, you will definitely need the following tools:
- Allen key
- Thread lock
Following a simple algorithm of actions, you can easily install a disc brake system on your bike.
- Find a suitable workplace. Ideally, this could be a garage, but if there is none, you can sit on the balcony.
- Remove all attachments from the bike, including the wheel.
- With the brake levers locked in place, install the caliper. But, before doing this, you need to check for the presence of a thread lock on the bolts. If it is missing, you will have to apply the fixer yourself.
- Secure the caliper with a hexagon and the brake hose with clamps.
- Reinstall the wheel and all removable parts of the bike.
- Spin the pedals and try hard braking to test how functional the system is.
How To Convert To Disc Brakes From V-Brakes On Mountain Bike
If you’ve never ridden a bicycle with disc brakes, it can take some getting used to. Do not go long distances at once, but practice driving in a place that is familiar to you. You will quickly adapt to new driving conditions and experience the enormous benefits of a disc braking system.