In order to keep up with the evolving requirements of cycling's governing body, SRAM has softened the edges of its CenterLine Rounded Rotor. The 12-spoke design reduces warping and distortion when you're pushing your brakes to the absolute limit on scintillating downhills over thousands of vertical feet. It's 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. FEATURESA disc rotor meant to reduce risk of injury in crashesStainless steel construction optimizes strength-to-weightKeeps center of friction consistent to minimize vibration and noise12-spoke design reduces warping and distortion after heating upVariety of rotor sizes for all cycling disciplinesIncludes one rotor and six attachment boltsTECH SPECSDiameter: 180mmAttachment Type six-boltCompatibility: all SRAM and Avid disc brakes