SRAM's HS2 Rotor is a mountain bike specific rotor optimally designed to improve brake performance while reducing noise and increasing heat dissipation. Featuring a thicker 2.0mm build and a new 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. It is available in 6-bolt and Center Lock versions, and is made in 160, 180, 200 and 220 mm sizes.