Tektro TRP A-11 20mm Adaptor for Disc Brakes Black Compatible with all TRP and Tektro disc caliper 160, 180, and 203 rotor sizes Converts 140 post mount to 160 or 160 post mount to 180mm Simplified and lower profile design allows for the use of only 2 bolts instead of 4 Tektro Disc Brake Adaptors