Originally Posted by
Scooper
Uh, that big metal thingie that appears to be pressed into the BB shell?
There isn't much else it could be. Just don't ask me why nearly a quarter of the race is cut away, 'cause I don't have a clue.
You'll note though that that metal sleeve goes all the way from one side of the BB to the other. There's no way that is part of a cup. It's just a sleeve reinforcing the BB, Columbia use a similar form of reinforcement.