The design of the brake discs is somewhat different. Some are solid, but others are hollowed out by connecting the two contact surfaces of the valve disc with fins or blades (usually as part of the casting process). The weight and power of the vehicle determine the need for the ventilation panel. "Vented" brake discs are designed to help dissipate heat and are typically used on heavily loaded front brake discs.

The brake disc is a very important part of the brake system. A good brake disc has stable braking, no noise and no jitter. Many DIY players do not want to replace the brake disc by themselves without certain professional knowledge, because the original brake disc has been tested by many professional engineers and can fully withstand the braking force of their cars.