I’ve just installed a new bottom bracket in my bicycle. It’s a Shimano UN26, 68 x 113 mm (1 mm narrower than the old one, but that’s just closed up the little gap I had anyway), and cost $40. I’m posting this just so that I don’t forget…
I’ve finally figured out how to know which way to undo the BB and lockring: The direction the pedals go in, that’s tightening (so things don’t fall apart). Just go the other way. So looking at the chainring side, go clockwise.
So no more clunking BB for me — huzza!