Brake Parts Disc
Bicycle disc brakes consist of a metal disc attached to the wheel hub that rotates with the wheel. Callipers are attached to the frame or fork along with pads that squeeze together on the disc. Recent material advances in weight, costs and reliability have led to new disc brake systems Bicycle disc brakes are used mainly on mountain bikes but also sometimes on hybrid bicycles and touring bicycles. Many tandem bicycles have a disc brake on the rear wheel in addition to rim brakes; the disc brake can be set to provide a constant drag, so that during long descents, the rim brakes are not overworked by the heavier machine.