Originally Posted by
Bill Kapaun
Thinking about this a bit and it seems the concept of our rings/cogs with an odd number of teeth couldn't exist with 1" spacing vs our 1/2" spacing.
Why not? It's inch pitch, so why can't you have 1 inch pitch 25t (comparable to modern 50t ring).
However, you're right that it reduces gearing options because you can't have the equivalent of a 39t (for example). Then again mtn riders haven't used odd numbers from the beginning.