42 Tooth Sprocket for #25 Chain with F4 Mounting Pattern
- Made from Aircraft Grade Tempered (Hardened) Aluminum
- F4 4-Hole Freewheel Mounting Pattern
- For #25 Chain
- 42 Teeth
- 3.5" OD
- 54.1mm ID
- Four 6.2mm ID Bolt Holes @ 90 Degrees
- 65mm Bolt Circle Diameter