Jim Sullivan wrote: <snip> the 980 that is on it has a frozen bolt, that won't budge. it's the 6mm bolt that goes into the dropout. the bolt moves in the dropout, i can see that. the bolt is actually frozen to the derailleur itself and won't spin and i can't get the 980 off. <snip>
If the bolt moves in the dropout but not in the derailleur, treat the derailleur as part of the bolt: remove the lower pivot bolt and jockey cage, and remove limit screws so the derailleur clears the chain stay, and use the derailleur as your wrench handle.
This, of course, presumes the lower pivot bolt is not similarly frozen. If the upper bolt turns in the dropout, though, this should work. I just went up to the attic to check out a Bianchi (126 OLD) with a 980 and you should have clearance.
Tom Donahue
Melbourne, FL US