Originally Posted by
DiegoFrogs
At least on the first generation GT, you'll need the long-cage bolt.
The short-cage version has the cage pivot bolt screw into the cage, whereas on the GT version the cage pivot bolt also does double-duty as the axle for the jockey pulley.
Thanks for that extra, essential detail! It completely slipped my mind.
Some shots of the short cage derailleur and pivot bolt....
and the GT version....
Steve in Peoria