A braking system that employs a circular drum attached to the wheel hub. Curved brake ‘shoes’ inside the drum provide the friction necessary to slow the vehicle down. A piston, hydraulically or mechanically operated by the brake pedal, forces these shoes outwards so that their linings bear on the machined internal surface of the drum, thus slowing the car. The global trend is away from drums and towards more effective but also more expensive discs. Most current Indian cars come with disc brakes up front but, as braking forces at the rear wheels contribute much less to overall braking, drums are used at the rear.