SRAM HS2 Disc Brake Rotor - 220mm, Center Lock, Rounded, Silver/BlackThe SRAM HS2 Rotor is a mountain bike specific rotor designed to improve brake performance while reducing noise and increasing heat dissipation. It features a brake track pattern for increased pad traction and recessed spokes with thermal dissipating paint, the HS2 is a more powerful, quieter rotor with best in class heat management. Includes lockring Thicker 2mm disc brake rotor features spokes coated in thermal dissipating paint for superior heat