Bike Brake Shoe

Mechanical brakes are the most common. They dissipate kinetic energy in form of heat generated by mechanical friction between a rotating metallic drum or disc & a stationary friction element brought into contact with it by mechanical, hydraulic or pneumatic means. The friction elements for drum brakes may be bands or shoes i.e. blocks with one surface concave.
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It works on a mechanism where the drum brake is actuated to contact with internally expending shoes in it, by pressure exerted on Brake Pad/ Lever directed on semi-circular brake shoe by a system of flexible Cables/ rods.