Quote:
Originally Posted by cgolvin
The only potential problem I can imagine is if the frame has a braze-on for the front derailleur. I believe some people have had issues with the FD being low enough for a 46, even resorting to a file. The 29 should not be a problem for a short cage RD.
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This is a good point. Modern frames are designed for compact cranks, and have the braze-on lower, but classic era frames will probably be designed for "standard" size cranks, and have the braze-on mounted higher. There are ways to deal with this, including adapters to lower a derailleur on a braze-on tab.