On Oct 22, 12:45 pm, Prague Tech wrote:

So here is my question:
Was it really my massive lower body prowess that killed this BB
spindle? Or is it that Shimano is making crappy spindles that shread
after 5 months? Or is the pedicabbing I do on this bike just that
hard on the torquey bits?

Perhaps it was a combination of the three. I bring this to the R.B.T
group as none of my pedicabber buddies have had this particular
mechanical failure before. Chalo on the other hand has done it a few
times before resulting in his oh-so-fashionable grillz. (him 300+ lbs)

-Ken Cameron
humble neighborhood pedicabber

http://pardo.net/bike/pic/fail-001/FAIL-001.html

Scroll down to the bottom for the spindles. If a spindle's going
to fail, it seems like pedicabbing is a likely place - you probably
exert a frequent high startup torque. The BB spindle is a little
undersized for high load applications. The expensive cure for
this is a different spindle system. Other than that, it's possible
that avoiding the cheaper BBs helps (I have no evidence that
better BBs are made from stronger stuff, though) and periodic
inspection might help, though that is a nuisance with BB spindles.

Ben