Topic starter
According to the truvatic manual then I should use a 113mm bb with a chainline of 48.5
and sheldon says:
MTB Triple 47.5-50 mm Shimano spec, measured to the middle ring.
47.5 preferred, but for frames with oversized seat tubes, the longer dimension may be needed, because the fat tube places the derailer mechanism farther to the right.
But looking at the on-one, the rear triangle is quite accentuated and the bb shell is 68mm so would it be better to go for a 118mm. Plus there is a good deal on an FSA isis bb with that spindle length at the moment.
Andy
Posted : 14/07/2010 12:03 pm