SRAM HS2 Disc Brake Rotor - 180mm Center Lock Rounded Silver/Black. 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. 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 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. TECH SPECS Hub/Disc Compatibility Center-Lock Disc Pad Compatibility All Pad Compounds Rotor Size (mm) 180 Rotor Type One Piece keyword search SRAM HS2