Sram: CENTERLINE Centreline X rotors are the lighter weight version of SRAMs quiet, smooth, and robust Centreline rotors. The Centreline X rotor features a two-piece design with an alloy centre and steel brake track. Rounded edges make for easier wheel installs and are UCI-compliant. THINGS TO REMEMBER Compatible with both road and mountain bike brakes FEATURES AND BENEFITS Lightweight, two-piece design Rounded edges are UCI-compliant and allow for easier wheel install SPECIFICATIONS Diameter (Rotor): 140mm, 160mm, 180mmHub interface: 6-BoltBolt material (RT): Titanium Colour (RT): Black Rotor Type: Centreline 2-Piece