i'd think most any square taper double crank in 175 will bolt right up. I'd also expect that the same front derailleur that shifts between 53-42 will also shift between 52/39. That's not much of a difference. Heck, Ive used derailleur's meant for doubles to shift triples, so I'm sure what you'd like to do is fine.
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Last edited by -holiday76; 03-01-09 at 09:39 PM.