you need that. see how the hub has 2 "steps" with threads on them one is for the cog and tightens ot the right, the other is for a lock ring and tigtens to the left. a cheepo back one will set you back 30 notes.
@chris_crash started
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you need that. see how the hub has 2 "steps" with threads on them one is for the cog and tightens ot the right, the other is for a lock ring and tigtens to the left. a cheepo back one will set you back 30 notes.