While I'm reasonably sure this is ground that has been covered, I can't seem to find the results: I have a Pat. 71 Nuovo Record rear derailleur on my Italvega paired with a 14-28 freewheel. It bumps on the 28t cog, rendering that combination useless. I suspect that the maximum capacity of the RD may be 26t but would like to be certain of that before swapping out the freewheel.
Thanks,
Charlie Young
Honeybrook,
PA