Unworthy1 I have installed a sugino bottom bracket to the shell.The cups are of the british measurement of 1.37" X24tpi While the Non drive side flushes into the shell with ease the drive side cup doesn't quite flush leaving about 3 mm gap.I suppose I could torque on it to flush but I'd have to torque on it pretty tightly to get it flushed so I'm thinking either the drive side cup is too long or the threading is to short, please forgive my novice expierence here.Hope this helps a bit more.wrk101, Colnago cool beans.Miguela I got some thick "A _ _" socks I gotta pull out of tha draw. Yea it's a sweet little scoot.You can't buy everything....LOL!!!!!!