20 tooth 1/2" x 3/32" three prong sprocket.
This fits our CNC machined adapters with the 1.37-24 OD threads.
Any size ID will work and long as you order the 1.37 x 24 OD 3 prong adapter.
If you are going to use this sprocket with a freewheel sprocket you will need: 1-1/2" External Retaining Ring - 1.387" Free ID. (used as a spacer)
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