Originally Posted by
gettingold
The question is "why", Einstein.
Exactly, and Trek didn't ask why.
Originally Posted by
Brian Ratliff
No, it's just a broken frame. This is a used frame, which means that it's unlikely you really know if damage was caused by the original owner or not. I'm still going with the story that he got a bottom bracket stuck in there and weakened the interface trying to get it out. You don't really know if it's defective or simply mistreated. You assume it's defective, but you don't really know. There is a difference.
A BB shell that can be busted out of the frame with a BB wrench would be a defective frame. Think about the bikes you've had in the past and what chance in hell you have of twisting the BB shell with a wrench.
Then think about the force going through it with a 1750W sprint. Pedaling killed this frame.