Scooter brake shoes
Brake shoes wear the brake lining in brake drum systems. They are a curved piece of metal, with a friction material on one side. When the driver brakes, a wheel cylinder in the drum brake system forces the brake shoe to the outside, against the inside of the drum. This creates friction between the liner and the drum, which causes the scooter to brake. The kinetic energy is dissipated as heat. Brake shoes are often used for the rear axle, especially since most modern scooters brake sharper on their front wheels, so that the temperatures that the rear brakes have to handle are not so high. They are less expensive to produce than, for example, drum braking systems or disc brakes.