I just tried to put a 120 mm rear wheel with a 5 speed freewheel into an early 50's frame that measures 118 mm (?). The teeth on the 14t cog hit the chainstay and therefore it doesn't turn. I can't move the wheel further back because it is already against the gear hanger for the derailleur. Should I start looking for a 4 speed freewheel? The frame did originally have a derailleur because the brazed on fittings are there for the shift lever and the cable guides.
Paul Patzkowsky Longmont, Colorado