4-Hole Freewheel with 1.375" x 24 TPI Right Hand Threads
- F4 Sprocket Mounting Pattern
- 1.375" x 24 TPI clockwise threads.
- Four 6.2mm ID bolt holes.
- 60mm bolt circle diameter (BCD).
- 46mm center to center distance between adjacent bolt holes.
- Overall outside diameter 78mm (3-1/16").
- Works with 2-1/8" (54mm) ID chain sprockets with four bolt mounting pattern.