Originally Posted by Retro Grouch
So what's it look like? If it looks like there's a 5mm allen bolt that holds the body of the derailleur onto the clamp, you're in luck. Full retail on just the clamp part is around $12.00.
Incidentally, how's your seatpost fit?
Well that's the thing, I don't have it beside me, it's at home. I was planning to just get a new FD, but after some reading discovered that it might not be necessary. It sounds to me like the 31.8 and 34.9 Tiagra FDs are the same, a braze on, just with a different clamp. I was hoping to get confirmation so I could run by the LBS without having to go home first.
And the seatpost is the same size, no problem there.