Used in conjunction with the CRC-1 Crown Race Cutting Tool to machine 39.8mm crown race seats (1.5` standard) on tapered forks with 1-1/8` steerer tubesIncludes precision-machined adaptor body and 39.8mm high-speed steel crown race cutterCompatible with forks with a maximum 1.5` taper of 4.25 inchesRace CutterCRC-1CRC-15UPC/EAN/GTIN: 763477002143