The 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. ?FEATURES: Thicker 2mm disc brake rotor features spokes coated in thermal dissipating paint for superior heat management MTB-specific disc rotor May not be compatible with a brake calipers due to 2mm thickness Includes lockring SPECS: Rotor Type: One Piece Hub/Disc Compatibility: Center-Lock Disc Pad Compatibility: All Pad Compounds