The superbe was some pretty race specific componentry and as such was limited in what it
could handle. I wonder if the FD just won't handle the drop from 50 to 34, remember the
usual setup back in the day was 42 52 nothing like a 16 tooth difference.
I'd start looking at a Centaur Compact FD.
and yah, I agree with g-Funk put the superbe back on it.
marty

edit looked up superbe capacity and it is either 16T or 18T, so I stand corrected. It should
handle the difference. That said I stand by my statement of either put a centaur compact
or all the superbe back on.

marty