Sram centerline rounded center lock rotoroptimised to bring you consistent, vibration free braking, this centreline disc brake rotor enhances the performance of your road or mountain bikes mtbs hydraulic disc brakes. Sram has added the centerlock mounting standard, so its compatible with modern wheels. Plus, as the edges have been rounded, it meets the uci regulations for professional racing. This rounded design also makes your brakes run quieter and speeds up wheel installations.features material stainless steelcompatibility sram road and mountain bike mtb disc brakesmount type centerlocklightweightcenterline brake trackuci compliantmanufacturer's part number rt cln a2weight 160mm 166g 180mm 213g 200mm 284g buy sram components from chain reaction cycles, the world's largest online bike store.