18 tooth 1/2" x 3/32" three prong sprocket.
This fits our CNC machined adapters with the 1.37 x 24 OD threads.
Any size ID will work and long as you order the 1.37 x 24 OD RH, 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)
To find all the types & sizes of adapters - adapter - adaptor - Track Cogs - Lock Rings - Track Cog & Three Prong Sprockets:
Type " FWADP " in the Search box.
