Originally Posted by
guadzilla
Dude, you cant just put this out there and not say more...
BB90 gives you all the issues of BB30 without the benefit of larger bearing and compatibility with 30mm spindle crank. You are also at the mercy of the frame tolerance as the bearing is pushed directly into the frame. BB86 and PF30 at least allows you to glue in a high quality BB shell if the frame tolerance is trash.