It's difficult to adjust a bb with the nds crank arm mounted.
You've done this, right? You get home from a ride on your grocery getter and think something "down there" is loose. You check the pedal. Check. You move the crank arm back and forth. "Knock knock." Hmm. That's a little loose. But I just overhauled this bike a couple years ago. I don't want to remove the crank arms. I can loosen the lockring and tighten that adjustable cup, right? Right?
Man, that takes a while to get right. It really helped to be able to use a makeshift tool (needle nose pliers) to hold/rotate the cup where I usually place my pin spanner.
I wonder how/why it came so loose...
