Took the cranks and BB off my Giant - I've been meaning to do it for yonks, as I never got on with the 172.5 mm cranks. Gave it all a clean, and fitted the handy 170 mm chainset I had - it's now sporting a 52-30 chainset, which actually works OK (the front mech needs a bit of minor adjustment). I'll probably get some new chainrings for a more sensible combo, but blatting around town on the 52 chainring is a good laugh.