The disc is an important part of the bicycle braking system, mainly used to provide braking force to slow down and stop. The disc brake system is a common bicycle brake system with greater braking force, better thermal performance and better wet braking performance compared to the traditional V-brake and side-pull brake.

Disc brake system is composed of disc, brake caliper, brake handle, brake line, brake disc and other basic components. The disc is one of the most prominent parts of the brake system, it is a round metal object mounted on the inside of the rear wheel hub or the outside of the front wheel hub. Plates are usually made of stainless steel or aluminum alloy and have round or wavy grooves.

The role of the plate mainly has the following aspects:

Braking power is provided: When the rider pulls the handle, the brake caliper grips the disc, creating friction to slow or stop. Due to the large diameter of the disc and the large braking force, the vehicle can be slowed down or even stopped within a short distance, improving the safety of riding.

Heat dissipation: The heat dissipation performance of the disc brake system is better, which can avoid brake attenuation and brake failure caused by long-term braking. Due to the existence of the material and bumps of the disc, the heat generated by friction will be caused when braking, and will be quickly dispersed into the air to prevent the braking system from overheating. This is very important for the stability of the braking effect in the case of long-term braking, downhill, high-speed driving, etc.

Wet braking performance: Disc braking systems perform better in wet or rainy conditions than V-brakes and side-pull brakes. Because the braking force of the disc brake system does not depend on the friction between the tread and the brake pad, but produces the braking effect through the friction force between the friction disc and the brake pad. V-brakes and side-pull brakes rely on the friction between the tread and the brake pads. As a result, the disc brake system can slow the vehicle faster in wet or rainy conditions and provide stronger braking force.

Easy maintenance and replacement: Disc brake systems are also relatively simple to maintain and replace. Compared to V-brakes and side-pull brakes, disc brake systems have less exposed parts and are easier to clean and maintain. At the same time, the contact point between the disc and the brake pad is relatively independent, and can be replaced separately without affecting the use of other parts. This aspect has great advantages for some riders who are more convenient for maintenance.

In short, the disc, as a key component of the bicycle braking system, mainly provides braking force to slow down and stop. At the same time, it also has the characteristics of good heat dissipation performance, excellent wetland braking performance and convenient maintenance and replacement. These characteristics make the disc brake system become a common brake system in modern bicycles, and is widely used in mountain bikes, road bikes, commuter bikes and other types of bicycles.