[QUOTE=rumatt;21520829]Well I mounted the XT crank with 42/26 chainrings. I can go smaller than 42 because I can't lower the derailleur any further without it hitting the chainstay.
I got it to shift just fine, however the spindle is just a smidge too long. Dammit. I guess I need spacers or a different BB? Hrmpf.
Pic below shows the gap with the crank arm fully on.
QUOTE]
MTB cranks use a 73 mm wide bottom bracket road cranks use a 68mm wide BB. you can probably buy them on line 2.5 mm each. Or buy a new BSA bottom bracket that comes with the spacers. With out seeing the clearance you have you can probaly install an mtb front derailleur that has a shorter arm and a smaller radius to be able to go with smaller chain rings.