Front Derailleur clamp sizes - can they be converted?

[lunacycles]

From what you are saying, you will not be able to use your current FD on the new frame. If you have a larger clamp diameter now than what you will need there are shims you can add to make it work with the smaller tube diameter . But you can't make a smaller diameter clamp work on a larger diameter tube, which is what you indicate.

You also can't do anything to make a clamp-on FD work with a braze on mount. You can take a braze-on front derailleur and attach it to a QBP "Problem Solver" so it acts like a clamp-on, but there is nothing I know of that will do the reverse.

[malaholic]

Thanks for the explanation! That's about what I expected to hear. Bummer, sounds like I'll need to get a new FD also regardless of which frame I choose.