Originally Posted by
AnkleWork
Is this a square taper crank/bb?
Yup, it's square.
Originally Posted by
cale
You have probably rounded the flats in the crank arm.
Definitely could be the case, and another reason why I'm a bit wary of that bike shop. The tech seemed earnest enough but he said the BB looked fine, so I trusted his judgment.
Originally Posted by
cale
You're plenty heavy to cause a crank arm to pull loose, that is if the pedals don't break first.
This is my big worry, that the crankset, BB, everything is working normally, but I'm just too beefy for the setup. Everything works great when it works: there's absolutely no wobbling, the crank feels firm, and I don't think I jerk the pedals. But somehow the bolt keeps loosening.
In terms of looking for a better crankset/bb, anybody have any suggestions? Specifically for something heavy duty that can handle a big boy load?
I'm just going to contact the bike shop and lay it out for them, see what they suggest. At the minimum, I'll change out the BB. But if I'm bringing it in to them, it would be nice to just throw some extra cash at the problem for a beefier crankset. Only problem is that I'm totally unfamiliar with cranksets for mountain bikes/hybrids. Any info you guys can throw my way would be much appreciated.