Brake discs are a key component of braking systems invented in the late 1800s and still depend on them today.
As cars get bigger and faster, brake discs have to evolve to improve their stopping power.
How does Brake Disc work?
Brake discs are usually made of iron or carbon composite and are attached to the car's suspension.
When the driver brakes, the disc is clamped by the nearby pads, which themselves are held together by the brake calipers.
The resulting friction reduces the speed of the vehicle and, if enough pressure is applied, brings it to a complete stop.