Originally Posted by
Crankycrank
How did they switch the BSA cups? One side is reverse threads so without permanently damaging the shell this would be impossible. Are we missing something here?
Same question. "Installing" a cup on the wrong side seems like it would totally bung up the threads in the BB. Steel cups in an aluminum frame means the cups would act like a tap and rethread the aluminum BB. And it would take a LOT of force to do it. And then installing the cups correctly would rethread the BB again. This makes no sense. I think the OP misunderstood what the bike shop was saying.