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Old 03-19-18, 03:52 PM
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Originally Posted by ThermionicScott View Post
I think the spacing was more nebulous back then... a 5-speed bike might be 120-124ish mm, 6-speed required a definite bump up to 126ish, and 7-speed freewheels generally require a little bit more than that in practice.
True. The reality of rear OLN is much more complicated than 120 vs. 126. I have seen 120, 121 (which is really 4"), 122, 124, 125, 126, 128, and 130 rear OLN with freewheels.

That's because rear OLN width should be driven by freewheel width. There was no set standard for what width a freewheel "should" measure.
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