To ensure proper headset performance and longevity, special attention must be given to accurately machine the fork’s crown race seat. Park Tool's Crown Race Cutting Tool is a professional-quality machining tool for milling both the outer edge and lower surfaces of the crown race seat.
• Includes high speed steel cutters and adjustable collets to machine 26.5mm and 27.1mm crown race seats on 1” forks and 30.1mm crown race seats on 1-1/8" forks
• Unique adjusting system allows a tight fit of the tool on any fork, threaded or unthreaded (even forks with externally butted steerer tubes), ensuring a smooth, accurate cut and proper alignment of the fork in the frame
• Cutter sized for 1-inch standard is part #845 (sold separately)
• Cutter for 1-1/8 inch standard is #846 (sold separately)