In order to keep up with the evolving requirements of cyclings governing body, SRAM has softened the edges of its CenterLine Rounded Rotor. The 12-spoke design reduces warping and distortion when youre pushing your brakes to the absolute limit on scintillating downhills over thousands of vertical feet. Its available in a wide variety of sizes for virtually any riding discipline, from cross-country to downhill racing. Please note, each CenterLine Rounded Rotor is compatible with all SRAM and Avid disc brakes and includes all attachment bolts.