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Value - Our Guarantee Tony, Healy, AK What are Brake Drums and
where are they Located? Your vehicle’s brake drums are major
components in a drum brake system. A drum brake system consists
of brake drums, shoes, backing plates and wheel cylinders. Like
brake rotors, automotive brake drums are made from cast iron,
bolt onto the wheel hubs or axles, and spin at the same rate as
the wheels. However all of the components are confined to the
inside of the drum. Inside each brake drum sits one wheel
cylinder and two brake shoes, which are bolted to the backing
plate. When you press the brake pedal, hydraulic pressure is
transmitted to wheel cylinder causing the pistons to expand,
pushing the brake shoes against the inside surface of the drum.
The friction that this creates is what allows the vehicle to
slow to a stop. In a nutshell, your vehicle’s brakes convert
kinetic energy to thermal ene