Disc brake: It is divided into cable disc brake (wire disc) and hydraulic disc brake (oil disc), which is the most common braking component of mountain bike at present.
It is the cheapest brake structure. Because it looks like the English letter v, it is named V brake. The upper structure of the arm is driven by the brake wire, and the brake lever rotates around the fulcrum fixed on the rear upper fork or the front fork, and the brake pad is driven to brake by the friction generated by the brake pad rubbing the wheel. Therefore, a special friction belt is needed on the wheel.