With drum brakes, a hydraulic cylinder/piston complement between two brake shoes then pushes each shoe outward and into contact with the inner surface of the rotating drum. The brake shoe lining ...

The brake drum mounts to the wheel hub and encloses two brake shoes, a wheel cylinder, a series of springs, and other small parts. Like disc brakes, drum brakes rely on hydraulic fluid and friction.

A drum brake is similar in that the drum rotates with the axle and brake shoes press outward against the drum to cause friction to stop the vehicle. What is common between the two types of brakes ...