Which bike brake pads to choose

Which bike brakes are better to choose: rim or disc?

There are four types of bicycle brakes:

  • rim;
  • disk;
  • roller;
  • drum.

The last two types are now practically not used due to insufficient braking power. Except occasionally on city bikes. Roller brakes are not very popular due to the difficulties in their maintenance.

But drum brakes are familiar to many. They used to be installed on many touring bikes and were renowned for their reliability and durability. To brake, you had to pedal back. Such a system was not afraid of even the worst weather, did not require complex tuning, but it was not combined with the gearshift mechanism either. Therefore, for the new generation of bicycles, two types of brakes are now widely used: rim and disc. Which ones are better?

Comparison

For a long time, rim brakes had no competitors and were famous for their quality and reasonable cost. But lately they have a rival. disc brakes. They are considered more modern and reliable and more and more bicycle manufacturers are switching to them. To understand why, you need to consider their pros and cons.

  • reasonable price;
  • light weight;
  • light load on the spokes;
  • decent braking power;
  • simple construction;
  • easy replacement of parts.

All of the above applies to the most common of all types of rim brakes. V-brake. There are three other types of rim brakes: caliper, cantilever and U-brakes, but they are rarely used in touring, city and mountain bikes.

  • quick erasure of the rim and pads;
  • loss of braking power in bad weather;
  • strong heating in extreme riding conditions.

Disc brakes do not have all the disadvantages inherent in rim brakes.

  • higher power and smoother braking;
  • long term of operation;
  • independence from bad weather;
  • the possibility of extreme driving;
  • more attractive appearance of the bike.
  • higher cost;
  • heavy weight;
  • complex installation;
  • high load on the spokes;
  • rather complicated repair.

Thus, while disc brakes are more efficient, safer and more reliable, not everyone is ready to switch to them. The main stumbling block is their cost: they will have to pay much more for them than for rim.

There is only one conclusion: it all depends on the driving conditions you are accustomed to. If you only need a bicycle in the city or for quiet walks, then rim brakes can be dispensed with in order to save money. But if you like extreme driving, for which safety and reliability are first of all important, then it is better to stop at disc.

SRAM GUIDE R

4-piston model with comfortable lever. Its stroke can be adjusted even without the use of tools. The braking power is excellent, and the system works even better in damp conditions. Overall, bike buyers rate the model as “excellent”. This is the silver medalist in the rating.

Are You Using The Right Brake Pads? | The GCN Tech Clinic

Which is better mechanics or hydraulics?

which, bike, brake, pads, choose

The design of the hydraulic and mechanical systems is similar in many respects. However, it does not hurt to compare the individual items. Here is a list of the main features:

  • Price. Hydraulics are more expensive than mechanical systems. This is especially true for top-end bike models;
  • Weight, dimensions. The mechanics are more bulky, heavy and massive;
  • Modulation, power. Hydraulics in this respect is an order of magnitude better than mechanics. The mechanical brakes also perform well, but they are not overly superior to quality video breaks. Hydraulics do not require any effort to produce brakes, unlike mechanics;
  • Customization. Of course, the hydraulic system is more complicated for a big one, but it does not require constant adjustment. It’s better and more convenient. The mechanics need to be adjusted periodically as the brake pads wear out;
  • Bicycle maintainability. In this respect, as they say, everything is complicated. To repair a mechanical system, you need original parts. Restoring the hydraulics of a bike requires some knowledge. In addition, the mechanics are more reliable.

As you can see, the hydraulic system of the bicycle is superior to the “mechanics” in many ways, but it is more complex and expensive. As for the mechanics, it is simpler, more reliable, but in terms of operational properties, it is not much better than the usual rim brakes.

FSA Afterburner

This brake model is comfortable, ergonomic, as well as unpretentious and reliable, like the Japanese samurai. However, under cyclic load (heating), the system reduces braking performance and does not like dampness. The power and smoothness of braking of the bike is above all praise, the best in its price niche.

Disc brake design features.

The disc brake includes 2 units:

  • A disc made of metal called a rotor. They are produced in various diameters. The larger it is, the more effectively the bike brakes;
  • Caliper (device where the brake pads are located, pressing the disc).

The brake caliper is attached to the bike using an adapter. Different adapters correspond to different rotor diameters.

There are two ways to transfer pressure from the brake lever of the bicycle to the caliper. Here’s a list:

  • Mechanical. When the handle is pressed, the cable moves. In this case, the cable transfers the movement to the lever, and that transfers the movement to one or both brake pads;
  • Hydraulic. The caliper and the bicycle brake lever are interconnected by a hermetically sealed hydraulic mowing line filled with brake fluid or oil intended for braking. After pressing the handle, the oil pushed out by the two cylinders acts on the brake pad.

The benefits of disc brakes

The advantages of disc brakes include the following:

  • Significant power and braking performance of the bicycle (the reason is the high coefficient of friction of the pads on the disc);
  • Smooth braking, better modulation;
  • Bicycle wheels and pads last longer because the rim does not wear out;
  • The braking performance is independent of the weather, since snow and mud are not packed into the system;
  • The work of the bicycle braking system is not affected by the “eights”;
  • No adjustments needed. It is enough to configure the system once;
  • Components continue to function efficiently even when heated. Therefore, this variety is used in extremely difficult conditions;
  • The bike looks more compact and better in design compared to models equipped with rim systems.

Rating of the best hydraulic disc brakes

The rating list of braking systems 2021 was formed on the basis of real tests of each of the above models. The list of the best models is as follows:

Formula T1

The Formula T1 system design guarantees the best performance at a low weight. The point of contact is clearly defined, but not very pliable, the finger gets tired. But, if you get used to this system, it will become an excellent and reliable assistant on different quality roads. There is a drawback: on a long descent, the brakes emit a low squealing sound. If such a squealing of the bike does not irritate you, consider that this representative of the class has no disadvantages.

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Bosch

Country of origin: Germany. Bosch manufactures over 800 types of brake discs and pads.

What they praise for: Quality, durability, do not creak, they slow down well.

What they praise for: Price, quality, do not float, do not get dusty, do not spoil the disc.

Nisshinbo

Country of origin: Japan. Nisshinbo manufactures 4 types of brake pads, which do not contain asbestos and differ in color: A4000 (light green material, does not contain steel fiber), A5000 (dark green, does not contain steel fiber, A8000 (black material with low steel fiber), A9000 (blue, semi-metallic material) The pads are produced according to the quality standards QS 9000 and ISO 14001.

Praised for: Durability, brake discs do not wear out.

Which brake pads are best

Choosing among the analogues of this spare part, buyers want to choose the best manufacturers in terms of quality or price. In April 2021, the TOP 10 best brake pads on PartReview looked like this:

  • Akebono. 86% of positive votes. Average rating. 4.3
  • ATE. 80% of positive votes. Average rating. four
  • Nisshinbo. 77% of positive votes. Average rating. 3.9
  • Remsa. 73% of positive votes. Average rating. 3.7
  • Ferodo. 72% of positive votes. Average rating. 3.8
  • NiBK. 69% of positive votes. Average rating. 3.6
  • Allied Nippon. 68% of positive votes. Average rating. 3.7
  • Brembo. 67% positive votes. Average rating. 3.6
  • Textar. 65% of positive votes. Average rating. 3.5
  • TRW. 64% of positive votes. Average rating. 3.5

Hankook Frixa

Country of origin: South Korea. Hankook Frixa uses Kevlar fibers in the shoes. The brake pads are manufactured according to the QS9000 quality certificate and ISO 9001: 2008.

Praised for: Durability, quality, durability. What they scold for: Price.

Allied nippon

Country of origin: Japan. Allied Nippon Japan Brake Industrial Co. Ltd. uses mineral metallic. ferrocarbon (Ferro Carbon technology).

What they praise for: They do not generate dust, a wide range, the presence of ferrocarbon, they can withstand short-term overloads.

Rating of brake pad manufacturers

Brake pads are made by a fairly wide range of companies. In particular, brands of such countries as Germany, Russia, Japan, South Korea, Italy, China, USA, Great Britain, France and others are represented.

Wagner

Country of origin: USA. Wagner manufactures products in accordance with ISO 9001 and TS 16949 quality certificates.

Mountain Bike Brake Pads | Organic vs. Sintered. What’s the Difference?

What they praise for: They do not create dust, they are durable.

Country of origin: England. Available in Ultimax (up to 450 ͒C), Greenstuff (up to 650 ͒C), EBC Redstuff Ceramic, Yellowstuff and Bluestuff and Orangestuff (racing sports pads, maximum temperature 900 ͒C).

Praised for: Resistance to high temperatures. For what they scold: Price.

Advantages and disadvantages of brake discs

There are many more advantages than disadvantages:

  • Repair mechanics, easier hydraulics.
  • Not universal in installation.
  • A variety of mechanical modifications often makes it difficult to find spare parts.
  • During transportation, there is a possibility of curvature of the rotor, especially when the wheel is removed.
  • The impossibility or difficulty of securing the rack to the bike.
  • The cables do not need to be kept very clean, unlike the hydraulics. If oil gets in, the braking performance will decrease.

Design and types of bicycle disc brakes

Disc brakes are made up of the following components:

  • a handle. with its help, it sets the brake mechanism into operation;
  • pads. plates with a rough abrasive, metal surface capable of locking discs;
  • the caliper is essentially a cam mechanism that performs braking, the pads clamp the disc;
  • rotor;
  • adapter. bracket, a caliper is attached to it, directly to the bicycle frame;
  • brake line.

Disc brakes are of 2 types:

  • mechanical. the force to the brake is transmitted using a cable;
  • hydraulic. the force is transmitted through the hydraulic system, it is initially filled with mineral oil.

Shimano deore

  • This is a powerful, ergonomic hydraulic brake system for tough bikes.
  • Unique braking power and smoothness.
  • The set includes 2 types of pads.
  • Even in unfavorable weather conditions, you will really enjoy the obedience of the system as a whole.

Mechanical brakes

Mechanical ones have a cable drive. Their design is simplified, but they are reliable. The principle of their operation is primitive: pressing the lever pulls up the cable, bringing the movable block into working condition, presses the disc against the second, unregulated block. Clamping force is adjustable: wedge, lead screw, cam.

There are mechanical discs with 2 movable pads, but such a system is rarely installed.

The features of the service include:

  • Adjusting the clearance between the rotor itself and the pads. If this is not done, the handle may fail. As a result, the disc will not be pressed against the worn-out pad, but against the caliper. Operation will be disrupted, power will be lost. And soon wear and tear will be inevitable.

Best disc brakes

Of the large number of braking systems, cyclists use brake discs the most. Their popularity is growing rapidly, even on mid-range bikes we see this system most often. Here is an overview of the most popular models for today.

Hydraulic brakes

To drive the brake pads, a hydraulic line is used instead of a cable. Hydraulically connect the handle to the brake itself. The hydraulic line is filled with brake fluid at the required pressure. Pressing the handle, helps to displace fluid from the cylinder itself from the entire hydraulic system.

This creates pressure on the cylinder, which is usually placed on a bicycle frame. The cylinder is driven by a piston, then transferred to the pads, tightly blocking the wheel with a disc. Ideal for all bikes, but usually fits on premium bikes.

Disc brakes

Disc brakes on a bicycle are a brake disc, or it is also called a rotor, which is attached to the hub of a bicycle wheel and a caliper (machine), in which the brake pads are located. When you press the brake lever, the braking force is transmitted through a cable to the pads, which are pressed against the rotor and directly friction occurs and, as a result, braking.

Disc brake pads of different types.

Disc brake pads are used for disc brakes. There are different types and types, for example:

They are organic and metallized. Organic disc pads are soft, have a short life and wear quickly, but provide good brake grip. And metallized disc brakes are harder, as they are made of metal filling and are more durable and provide excellent braking on descents.

Disc brake pads are selected for a bicycle based on the type of disc brakes (for each brake model, the corresponding pads). You can determine which shoe is needed by its appearance and shape.

Installation, adjustment of brakes and V-brake pads

Steps for installing and adjusting V-brakes:

  • Attach the brake levers to the handlebars and adjust the position of the levers with a hexagon;
  • V-brakes can only be installed on a frame that has pivots for this type of brake:

There must be pivots on the bike to set the pads.

The brake pads must be evenly pressed against the rim, so it is important that the distance to the left and right is the same. If the distance is different, then the braking efficiency will decrease, one of the pads can overwrite the rim, as a result of which the pads will wear out unevenly. To avoid this, using the adjusting screws, we adjust the position of the pads, which are responsible for tensioning the spring of the brake lever (they are under a Phillips screwdriver or under a hexagon). If the screw is tightened, the shoe will begin to move away from the rim, if unscrewed, it will approach due to the spring of the brake lever. The result of these manipulations is to find the correct position of the pads relative to the rim. Remember that the block must not hit the tire.

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A special lamb. if you twist it, the distance will increase, if you unscrew it, it will decrease.

The distance between the shoes and the rim can be adjusted by turning the thumb on the brake lever. If you twist it, the distance will increase, if you unscrew it, it will decrease. If you cannot achieve the desired result on your own, contact the bike workshop.

  • Why hydraulic brakes are better and how hydraulic brakes are correctly adjusted on a bicycle
  • Find out which pads to put on the roller brake of the bike

V-brakes

V-brake type brakes. consist of two levers, which, when pressing the brake lever, are reduced to the rim by pulling the cable and braking occurs due to the friction of the pads on the rim surface. Typically, this type of brake is used on entry-level and mid-range bicycles.

V-brakes are of two types:

What Brake Pads Should I Get For My Mountain Bike? | GMBN Tech MTB Disc Brake Pad Explainer

Disposable brake pads for v-brakes.

Cartridge pads and cotter pins are often sold as a set. These pads are more expensive and perform better in wet weather. The cartridge pads are collapsible, which makes it possible to change only the rubber component. Brake pads are available, both for dry and wet weather and universal (all-season).

Red arrows indicate cotter pins for removal

It should be noted that any pads, both cartridge and disposable, are suitable for V-brake.

  • Be sure to find out more about which bike brakes are best in order to make the right choice.
  • Which brakes to choose disc or rim //velosipedinfo.ru/kakie-tormoza-dlya-velosipeda-luchshe-diskovyie-ili-obodnyie

Brake pads

The bicycle consists of many necessary simple mechanisms, one of which is the pads. this is an important component of the brake system of bicycles. It is on them that the quality, braking efficiency and safety of the cyclist depend.

Brake pads are of various types, both for rim brakes (V-brake type) and for disc brakes, their main difference is the type of design and, of course, the price range. The more expensive the pads are, the better and more efficient they are. Let’s consider in detail the brake pads for the above types of brakes.

Installing and adjusting disc pads

The sequence of actions for installing and adjusting disc brakes:

  • Attach the brake levers to the handlebars and adjust the position of the levers with a hexagon;
  • Install the caliper (machine) on the frame in special disc mounts;
  • Install the brake discs (rotor) onto the hub using the bolts (6 pcs.) That are included in the kit;
  • Fasten the cable to the brake lever, insert them into the jacket and, using the guides on the frame, guide the jacket to the caliper;
  • Attach the cable to the caliper. Now the most important point is to keep your hands clean before installing new disc pads, otherwise you may ruin the new pads. Disc brake pads are spring-loaded, which are applied when braking.
  • We insert the brake pads into the caliper, clamp them with a cotter pin (we bend the ends to fix the pads). Then adjust the position of the brake pads until the pads touch the rotor. The gap between the rotor and the disc must not exceed 1 mm.

After all adjustments and adjustments, do not forget to check the quality of braking and the tightness of all fixing bolts.

  • It will be useful for you to find out why the brakes on the bike squeak.
  • for popular models of disc brakes: www.velosipedinfo.ru/diskovyie-tormoza

Watch another video about tuning and adjusting the v-brakes from the guys from Veloshostka. For a clearer understanding

Types of bicycle disc brake pads and their features

Brake pads are consumable items. One of the most demanded parts for bicycles and other vehicles. Replacing them is necessary once or twice a season or more often with intensive use of the bike.

Every time when replacing pads, a person is faced with the problem of choosing new pads.

Let’s take a look at what pads for a bicycle disc brake are and how they differ in this article.

Disc brakes are widespread, but there are also other types of bicycle brake systems: drum or tick-borne (vibrake). For them, the information from this article will not be useful (although sometimes vibration pads are made from similar materials).

So, cyclists are divided into two types: those who carefully select the components and those who put on what will fit physically. Probably, the information will be useful for both those and others. Let’s start in order.

A bicycle disc brake includes a friction pair (most often a metal-non-metal), which is represented by a metal disc (or rotor) and non-metallic (there are also metal composites) brake pads.

When choosing new pads, you need to pay attention to the following important parameters:

What pads your rotor is designed for (unless, of course, you plan to replace it)

What standard of pads is used now. dimensional characteristic

What material is used for the pads currently installed on the bike

Let’s go through each of the points in detail.

Ceramic pads (Ceramic)

Quite a rare occurrence in the cycling industry, but occasionally occur. They are relatively expensive. The friction material here is represented by ceramic with friction properties.

Characteristics

  • Requires the use of a dedicated rotor.
  • They do not take small blows. The clutch may crumble.
  • They quickly get washed out in the mud. Work poorly when weather conditions change.
  • They rub for a long time.
  • Have the largest resource of all types of pads.
  • They are expensive and not widely used. Originally came to cycling as a pro weapon and not particularly well suited for everyday use.

Characteristics

  • They work well in any weather. They do not lose their effectiveness neither in the rain nor in the snow.
  • They rub for a long time
  • Medium modulation. the pads are firm and do not fit well.
  • Should only be used with a suitable rotor. The rotor for rubber pads will wear out quickly and brake grooves will appear on it, which will not allow the pads to fit snugly against the rotor, which means that the braking efficiency will decrease.
  • They have low braking performance. They work stably in any weather, but require more pressure on the handle. Have a slightly longer stopping distance.
  • Does not require constant drying.
  • Even with the correct selection of a rotor-shoe pair in bad and frosty weather, they often scream.
  • Have a high resource.
  • Suitable for heavy cyclists and highly loaded bikes. heavy bikes or e-bikes.
  • Can be easily cleaned from any contamination both by calcining and by mechanical cleaning methods.

Bicycle disc brake pads

Semi-metallic

  • combine the advantages of metal and organic pads;
  • good efficiency at high speeds;
  • good initial bite and modulation;
  • durable enough.
  • the working surface can be sintered;
  • different brands may have different ratios of metal and organic components;
  • higher price.

Disk

The basis for braking in disc brakes is a disc that is several times smaller in diameter than the wheel rim. The disc is fastened to the spokes using special bolt-on fasteners with brackets that tightly cover the spoke. Installation is much more difficult than V-brakes. Disc brakes are mainly used on bicycles in the high and medium price segment. For example, they have found their application on most road tracks, where, due to the speed of 40 or more kilometers per hour, the use of V-brake is not justified. Those, in turn, would quickly overheat and wear off when you need to slow down sharply when descending from a slight slope along the highway or near a dangerous turn.

The brake rotor (circular disc in the plane of rotation of the wheel) requires at least 6 support points for fastening. The mechanism adapter allows the brake caliper to be attached to the frame. The latter, in turn, engages the pads when pressing the brake levers on the handlebars. Finally, the pads are directly involved in the braking of the bike. Instead of cables, disc brakes also use a hydraulic system. pipes with a liquid, like the one used on cars.

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The hydraulics raise the cost at least twice, but the handling feels thinner and sharper, which allows the biker to ride on more difficult and unpredictable roads.

Manufacturing materials

The basis of the brake pads for disc or V-brakes is steel or aluminum alloy. The disc rotor of the wheel is most often made on this basis. But the pads themselves can use ceramics, pressed and sintered aluminum powder, plastic, rubber or high-strength compound as a working layer.

Brake pads made of pressed baked metal powder are the most “long-lasting”. Their field of application is disc brakes. The disadvantage is less effective braking (longer braking distance). But that is precisely why they are valuable on racing bikes. The fact is that too fast braking at a speed of 30-40 km / h is fraught with throwing the cyclist out of the saddle. This is where the braking distance of up to hundreds (and not a dozen or two) meters is needed, and the tire, after several sharp braking, tears off to the cord. But when descending a hill, braking for too long is undesirable. you can not slow down at all, at the first turn or bumps, crash into any obstacle without fitting into a sharp turn.

Composite is somewhat better than ceramics, for example, the same plastic. When overheating, for example, during a long descent on a road with a slope, the plastic is bored extremely quickly. These brakes are more effective than metal and ceramic brakes.

Rubber (Resin PAD). the most effective, but also the least wear-resistant brakes. Several hundred meters of stopping distance from a steep hill will completely “kill” them. They provide the strongest adhesion to the rim or disc, but for the time being: after rubbing the rubber to the metal, plastic or composite that makes up the bearing part, they become as ineffective as metal / ceramic, however, they begin to abrade the rim intensively either disk.

Semi-metallic models are a hybrid of composite and metal. Metal powder (in the ratio, for example, 1: 1, 1: 1.5) is mixed with an extra strong compound. Braking Performance. Medium.

Remember that the harder and more durable the pad material, the longer it will last, but it will be less effective at braking and will squeak louder.

V-brake

V-brakes are the simplest V-shaped brakes that are operated with a cable. The rim itself acts as a brake disc without any additional layer or other base. The levers of such a brake are extremely simple. they resemble the closing parts of a spring-loaded caliper. As with all brakes, the pushing force from the brake lever on the handlebars is transmitted by a cable encased in a “jacket”. a waterproof plastic tube that prevents scratching and premature rusting of steel strands.

The rim brake pads are here screwed onto the caliper elements using bolts, nuts and lock washers. It is important not to confuse left and right. the pads are curved to the shape of the rim, and do not stand straight like bars, which makes it possible to brake faster and more efficiently. The middle line of the pad matches the middle line of the rim.

At the same time, the rim itself has a corrugated, “pockmarked” surface, and this “ripple” is parallel to its outer circumference, which allows the shoe to quickly rub in and “wedge” into it during braking, creating an extremely large contact area of ​​the rubbing surfaces. The dimensions of the rim do not really matter. the efficiency of rim brakes does not differ significantly with different wheel diameters.

The V-brake shoe, although it has a steel base, has a polymer layer on the side of the braking surface. most often plastic or composite. Although the V-brake manages to stop almost instantly, this layer wears out quickly due to the high angular velocity of the rim. It is several times larger than the braking surfaces of other types of brakes, in which the rubbing layers are much closer to the center of the wheel (hub). Only the pads themselves are replaceable, then the cables are located according to the frequency of change.

The V-shaped brake caliper can be left in place for several years. it is considered the most durable part, as are the handlebar grips. However, as you continue to ride with worn out pads, you scrape off the aluminum layer by layer that makes up the rim, and it will eventually bend significantly at full speed, if not break. The latter is already life-threatening. For the highest level of safety, rim brakes come complete. front and rear.

Bicycle brake pads: varieties and tips for choosing

A bike without brakes is a direct road to an accident. Only a few models of bicycles for extreme, cycling freestyle are not equipped with brakes, or bikers willing to risk their lives for the sake of adrenaline release their default bicycle brakes on their own. But a calm and fast ride is impossible without them.

The bicycle industry offers the following types of brakes: V-brake, drum and disc. The first are cheap, with a small resource, the second is a compromise option, the third are the most “long-playing”, but also expensive.

Drum

The drum brake is a classic in the cycling industry. It was with him that the development of the brake system began. Bushing body. a drum in which the pads are part of a conventional sleeve-bearing mechanism. When the cyclist pedals in the opposite direction, the pads are pressed more tightly against the inner surface of the hub, due to which the bike slows down.

They are durable and do not need to be replaced for years. more likely, the ball bearings and other spare parts themselves will fail, than the pads themselves, since from a teaspoon to two tablespoons of lithol or solidol, which serves as a lubricant, is stuffed into the sleeve. It also removes friction of previously dry pads by 98%. All parts, including the pads, are made of steel, which also ensures their durability. No aluminum, composite, plastic or rubber like other types of brakes.

Brands

The recognized giants of the cycling industry over the past 10-20 years are the American company Sram and the Japanese company Shimano. Chinese and Taiwanese manufacturers (for example, Artek), of which there are dozens, are also striving to improve the quality of their products at least to the Japanese level, and not without success. Some thrifty consumers cheerfully report about a very good brake resource for not too extreme riding, for example, on a walk or on long bike trips, bike trips.

With a simple V-brake from Shimano, mounted on a cheap mountain bike for 10-20 thousand rubles, you can easily drive 1000-2000 kilometers on trails (and being passing through cities along the way), and still change worn out pads with new ones.

You can guess about their wear both by the sharply decreased braking effect and by the loss of smooth contact. Perhaps the “rubber” squeak will change to a metallic clang.

Whichever brake you choose and how long it lasts, do not skimp on safety. The brakes were invented not so much by cowards as by those who would not want people to lose health or even life because of their absence. As soon as braking has deteriorated significantly due to wear of the rubbing surfaces, change both the pads and the rims themselves (discs, drum bushings).

Next, watch a video on how to replace or install brake pads on bicycle disc brakes.