The Sugino 75 Crankset.

First of all...i was on Benscycle, and saw the Sugino 75 Cranks and was in awe. That crank cost more than my frame. WTH.

In any case, my amigo says he bought a cinelli vigorelli frame that came with a Sugino 75bb with which his Sugino RD2 cranks did not fit.

So i thought he might not be doing something right. While looking up specs on both his cranks and the Sugino 75 crankset (not the BB lol), the interfaces were the same. Square taper JIS etc. If thye were the same, they should fit the same bottom bracket....idk whats up. Maybe we're doing somethign wrong, maybe there was something lost in some sort of incorrect terminology.

Basic problem: Sugino 75 Bottom Bracket was not working with the RD2 crankset, also made by Sugino.

Thanks guys.