SRAM CenterLine Disc Brake Rotor - 180mm, Center Lock, 1.85mm, Includes Internal Tooled LockringThe CenterLine Rotor was designed to keep the center of friction consistent throughout rotation thereby minimizing vibration offering consistent performance and a quiet ride. Compatible with both road and mountain bike brakes Lightweight, two piece design Rounded edges are UCI compliant and allow for easier wheel installs Product Specifics Rotor Size (mm): 180 Rotor Type: Two Piece Pad Compatibility: All Pad Compounds Hub Disc Compatibility: Center