The FSA crank set is made for a road frame and only comes in 68mm English or 70mm Italian BB shells. Mountain bike cranks and BB would fit best or go back to the older road bike 106 or 600 road square taper cranks and then use the square taper BB (same as mountain) probably 1 to 2 sized longer to clear the inner ring to the frame. The BB comes in both 68 and 73 but because of the chain line with the bigger rings the BB axle will need to be a little longer to clear the frame.