Bicycle brake

Brakes help a bike stop.

They slow the wheels down. This keeps you safe.

Long ago, bikes used spoon brakes.

A metal shoe pressed on the tire. This could wear out the tire.

Some bikes use rim brakes. These use pads to rub the wheel rim. They are light and easy to use.

Other bikes use disc brakes. These are often used on mountain bikes. They work well even when it is wet.

Brakes turn movement into heat. This heat goes into the air. Now you know how bikes stop!

Brakes help a bike slow down or stop.

Most brakes work using friction. Friction is a force that happens when two things rub together. This rubbing turns movement into heat. The heat then goes into the air.

Early bikes used spoon brakes. A metal shoe pressed onto the front tire. These could wear out thin tires quickly. Later, people used the Duck brake. This used two rubber rollers to grip the tire.

Many bikes use rim brakes. These use pads to rub the metal rim of the wheel. The pads can be made of rubber, cork, or leather. Rim brakes are light and easy to fix. However, they work poorly when the rims are wet. They can also get clogged with mud.

Another type is the coaster brake. This is found inside the rear wheel hub. You use it by pedaling backward. This type does not wear out the tire. Some bikes use disc brakes too. These work well even in wet weather.

Bicycle brakes are essential tools for safety. They help a rider slow down or stop completely. Most systems work by using friction to turn movement into heat. This heat is then released into the air.

A brake system usually has three main parts. First, there is a way for the rider to signal a stop. This is often a lever on the handlebars. Next, a cable or hose carries that signal to the wheel. Finally, the brake mechanism itself presses two surfaces together.

Early bicycles used very different ways to stop. In 1817, Karl Drais used a pivoting brake shoe. This pressed against a rear iron tyre. Later, the "boneshaker" used a spoon brake. This was a pad that pressed onto the top of the tyre.

Penny-farthings also used spoon brakes or back pedalling. As rear wheels got smaller, front brakes became more important. John Kean introduced a front brake in 1873. This was widely used by 1880 because it had more stopping power.

New tyres changed how brakes worked. The Dunlop Tyre Company made pneumatic tyres in the 1880s. Spoon brakes could wear through these thin tyres quickly. This led to new inventions like the Duck brake. Abram W. Duck patented his roller brake in 1897.

This brake used twin rubber rollers to grip the front tyre. In 1898, the first internal coaster brakes appeared. These were hidden inside the rear wheel hub. They worked when the rider pedaled backward. This helped prevent tyre wear.

Rim brakes are a very common type today. They work by pressing pads against the metal rim of the wheel. These pads can be made of rubber, cork, or leather.

Rim brakes are light and easy to maintain. However, they can work poorly when the rims are wet. They can also get clogged with mud or snow. If a rim is warped, the braking might feel uneven. Riders must check their rims for wear to stay safe.

Modern bikes also use disc brakes for better control. Disc brakes use a metal rotor instead of the wheel rim.

This allows them to work well in wet weather. Some riders even use special pads to help with braking. For example, salmon-colored pads can help on wet aluminum rims. These pads are made by companies like Kool-Stop. Understanding these tools helps riders choose the best bike for their path.

A bicycle brake is a device used to reduce speed or prevent a bicycle from moving. These systems work by using friction to manage energy. When a rider applies the brakes, the system converts the kinetic energy of the bike and rider into thermal energy, which is heat. This heat is then dissipated into the surrounding air.

Most modern systems consist of three essential components. The first is the mechanism for the rider to apply the signal, such as brake levers or pedals. The second is a transmission mechanism, like Bowden cables, hydraulic hoses, or rods, which carries the signal to the wheel. The third is the brake mechanism itself, such as a caliper or a drum, which presses surfaces together to create friction.

The history of braking is as old as the bicycle itself. In 1817, Karl Drais included a pivoting brake shoe that pressed against a rear iron tyre. Early bicycles like the "boneshaker" used a spoon brake, which was a pad pressed onto the rear wheel. This was often operated by a lever or a cord connected to the handlebars. Penny-farthings also relied on spoon brakes or the technique of back pedalling to slow down. As bicycle designs evolved between 1870 and 1878, braking moved toward the front wheel. John Kean introduced a front brake in 1873. By 1880, front brakes were widely adopted because they offered much greater stopping power.

As technology changed, new braking methods were required to protect new materials. The introduction of pneumatic tyres by the Dunlop Tyre Company created a problem for spoon brakes. These brakes tended to wear through the thin casing of pneumatic tyres very quickly. To solve this, Abram W. Duck patented the Duck Roller Brake on November 23, 1897. This system used a rod and a lever to pull twin rubber or wood rollers against the front tyre.

In 1898, the first internal coaster brakes were introduced for the rear wheel. These were contained within the rear wheel hub and were controlled by backpedaling. Because the braking happened inside the hub, it eliminated the issue of tyre wear. Coaster brakes became very common in the United States throughout the first half of the 20th century.

Rim brakes are a very common type of braking system used today. They are called rim brakes because the braking force is applied by friction pads to the rim of the rotating wheel. These pads can be made of materials like rubber, cork, or leather and are often mounted in metal shoes.

Rim brakes offer several advantages, including being inexpensive, lightweight, and mechanically simple. They are also easy to maintain and provide powerful stopping force. However, they have specific disadvantages. They perform poorly when the rims are wet and can brake unevenly if the rims are warped. Additionally, rim brakes are prone to clogging with mud or snow because the rims carry debris from the ground directly to the pads.

Maintaining rim brakes is vital for rider safety. The brake pads will naturally wear down over time and must be replaced. As they wear, their position may need adjustment to keep them centered.

If the rims themselves become too worn, they can fail catastrophically. It is also important to watch for heat build-up. During a long descent on a heavily laden bike, the friction can generate thermal energy faster than it can dissipate. This heat build-up can potentially damage components or cause brake failure. Some riders use ceramic coatings on rims to reduce wear and improve heat insulation.

Different materials can be used to change how a brake performs. Brake pads come in many shapes and materials to suit different needs. A softer rubber pad can provide more braking force with less effort, while a harder pad lasts longer.

For wet-weather riding, some cyclists use special pads containing iron (iii) oxide. These salmon-colored pads, produced by companies like Kool-Stop, provide higher friction on wet aluminum rims than standard rubber. For carbon fiber rims, riders must be careful to use non-abrasive cork pads to avoid damaging the material.

Modern cycling has also seen the rise of disc brakes, which offer different benefits than rim brakes. While rim brakes act on the wheel's outer edge, disc brakes use a metal rotor.

This design allows the braking surfaces to stay higher off the ground, making them less likely to clog with mud. Because the braking happens on a dedicated disc, these systems often perform more consistently in various weather conditions. Whether using a simple rim brake or a complex hydraulic disc system, the goal remains the same: the safe and controlled management of motion through friction.