I built this old Pinarello with a Campy RD (older Athena) and a 7-speed freewheel that is 12-28. Friction shifters. 53-39 crankset.
Neither one of the limit screws are useful, screwed all the way in they still don't touch. If I'm not careful, I could push the RD and the chain into the spokes. I can shift through all gears but am worried about hitting the spokes.
Is the freewheel too big? Should I drop to a 25 or 26 big cog?
Another thought is the chain may be too long; I didn't do any measuring other than to eyeball it.