Originally Posted by Danhalen
I'm pretty sure the Sugino 75 bb has a spindle length of 109. That would throw your chainline off by 1mm. Not a big difference but might count for something.
that would throw it off by 0.5 mm, not 1 mm. Moreover, I could be wrong but I think the chainline of the surly hub is 42.5 mm, which would go perfect with the 110mm BB. At any rate, I've measured the chainline and its less than 1mm off. To put it another way, the chainline is close enough to perfect that my calipers and metric tape measure can't detect a chainline different from perfect.