Dual-disc brake rotor

A dual-disc brake rotor (often referred to as a split brake rotor) is a high-performance braking component whose key feature is the separate design of the friction surface and the central hub. It is primarily used in sports cars, racing vehicles, and modified models with extremely high demands on braking performance.

Core structural features

It consists of two separate friction discs and a central coupling head. The friction discs are connected to the coupling head via floating pins or spring blades, rather than being integrally cast.

The friction disc is typically made of high-carbon cast iron (which offers high-temperature resistance and excellent wear resistance), while the central coupling head is made of aluminum alloy (for lightweight design).

Some dual-disc brake rotors also feature perforations and grooves on the friction surface to further enhance heat dissipation and chip removal capabilities.

Core Advantages

Extreme heat dissipation + resistance to thermal deformation: The split-design ensures that the heat generated by the friction disc is hardly transferred to the wheel hub and bearings, thus preventing component damage caused by high temperatures. At the same time, the friction disc can expand freely with temperature changes without warping or deforming due to rising temperatures, guaranteeing a perfectly flat brake surface during braking.

Lightweight design enhances handling: The aluminum alloy hub significantly reduces weight compared to a cast-iron hub, lowering the unsprung mass of the wheels and improving the vehicle’s suspension response speed and handling agility.

Maximum braking stability: Even under extreme conditions involving continuous, intense braking on the track, the system maintains stable braking force without experiencing thermal fade that could lead to longer braking distances.