The 690 cutting facer is used on the HTR-1, HTR-1B, BFS-1 and BTS-1. The facer has an outside diameter of approximately 45mm.
NOTE: For sharpening services of cutting tools see Park Tool Sharpening Services. Always use cutting fluid such as Park Tool CF-2 when machining.
SHIS terminology: The 690 faces headtubes in the EC29, EC30, EC34 and EC37 standards.
