The SRAM CenterLine XR (CLX-R) rotor works in tandem with the SRAM eTap AXS™ drivetrain. It’s designed specifically for road riding — and to keep braking quiet at every stop.Streamlined form optimized for road useCenterLine track offers quiet brake operationTwo-piece design reduces weightSpecifications:Diam (Rotor): 140mm, 160mmHub interface: 6-bolt, Center LockBolt material (RT): n/a, SteelColor (RT): n/aRotor Type Centerline: 2-Piece