i actually don't know how to tighten a cog and lockring. i mean, without over-tightening. i've never had to do it, so i've never had to learn. his roommate keeps tightening it for him, but...i guess it isn't working.

i just thought it funny that all this **** happens not when he's riding home from work, or when doing errands, but when he's riding with me. i'm a curse...