1992 Slim Chance Front derailleur pull/clamp diameter

Hi- I am waiting on my 92 Slim to come back from paint, what
Is the clamp diameter, and should I go for a braze on?
Also, the bb thread is English, and is the diameter 68, 72, etc?

Last edited:


New member
Spot on: 28.6 and 68mm BSA english threads. Don't go for a braze on, but pick a nice clamp on instead. It was designed that way. Good luck!