That is correct. There’s a plus or minus of a mm or so, but that ought to get you where you need to be.
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Eric,
Alright man. I'm just trying to get this straight. I tried measuring it and it didn't come out right.
So if I put a Dingle cog on this 130mm hub 47.5 would be dead center between the two cogs on the Dingle, right? And the teeth on the Dingle are 5mm apart, right? So the inner teeth would be at 45 (47.5 - 2.5) and the outer teeth would be at 50 (47.5 + 2.5), right?
Thanks for the help.