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.Features:- Lightweight, two-piece design- Rounded edges are UCI-compliant and allow for easier wheel installs- Compatible with both road and mountain bike brakesSpecifications:- Diam (Rotor): 140mm, 160mm, 180mm- Hub interface: 6-bolt, Center Lock- Bolt material (RT): n/a, Steel, Titanium- Rotor Type: Centerline 2-Piece