CenterLine X rotors are the lighter weight version of SRAM's quiet, smooth, and robust CenterLine rotors. The CenterLine X rotor features a two-piece design with an alloy center and steel brake track. Rounded edges make for easier wheel installs and are UCI-compliant. - Compatible with both road and mountain bike brakes - Lightweight, two-piece design - Rounded edges are UCI-compliant and allow for easier wheel installs - Hub interface: 6-bolt - Includes Steel rotor bolts