Brakes, Disc A brake that uses a disc shaped rotor and calipers that hold friction pads. The rotor is attached to the wheel hub and spins with it. The calipers are stationary. When the brake pedal is depressed, the calipers press on the side of the side of the rotor. The friction pads slow the rotor as needed.
Most vehicles use disc brakes on the front wheels.
When the brake pedal is depressed, the brake shoes contact the sides of the can and slow the wheel. Drum brakes are usually mounted on rear wheels. Drum brakes are prone to fade, or heat buildup, which reduces their effectiveness. A term used to describe an engine's ability to fill its cylinders with air-fuel mixture and then discharge the burnt exhaust gases. In general, the more air-fuel mixture an engine burns the more power it produces.