The Sram Rotor HS Center Lock is a mountain bike specific rotor designed to improve brake performance while reducing noise and increasing heat dissipation. Featuring 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.Sram Rotor HS Center Lock FeaturesThicker 2.00mm rotorSuperior heat management7% more powerAvailable in 6 bolt and CenterlockMTB specificDiam (Rotor): 160mm, 180mm, 200mm, 220mmHub interface 6-bolt, Center LockBolt material: (RT)n/a, SteelRotor Type: HS2, HS2 Centerlock