Originally Posted by
BCRider
Check out the smeared metal embedded in the threads of the BB. That's metal torn away from the crests of the shell threading that was holding the BB in place. It's pretty much reamed it all away. Also the stringy looking things you see in the picture of the BB shell is actual thread metal that was sheared off. Much damage has been done.
I could be wrong but to my eye the bb collar looks aluminum and the bb in the frame looks steel, although it is on the thick side if it's steel.
Could it be that the frame required an English BB and someone tried to force in an Italian one?
At any rate, I don't think we can recklessly assume the debris comes from the threads in the
frame.