Designed to reduce braking noise and improve heat dissipation, the SRAM HS2 rotor helps our bikes stop faster than ever while staying quiet on steep, sustained descents. The HS2 is thicker than previous SRAM rotors, measuring a full 2mm thick, and it uses a new brake track pattern that increases traction against the brake pads. These features work together to improve stopping power, while the recessed spokes with thermal dissipating paint keep the rotor running cool.