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. Spokes coated in thermal dissipating paint for superior heat management MTB-specific Thicker 2.00mm thick rotor Superior heat management 7% more power Direct replacement for SRAM Centerline rotors with any SRAM brake caliper. If your new rotors are a different size than the ones you&';re replacing, then you&';ll need new brake adapters! Check out our guide to getting the right brake adapters to spend less time on the computer and more on the trails.