Originally Posted by
Paramount1973
It is a 1" seat tube. Just get a 25.4 to 28.6 shim (these are for 1 1/8" threadless stems to a 1" threadless steerer tube. Just hacksaw it in half and use it to shim a front derailleur with a 28.6 clamp.
I found a 1" round bronze bearing at my local ACE and did the same. Works like a champ and is flexy enough to fit snuggly around the seat tube without slipping out of place while you position the FD.
