Originally Posted by
Lukie
Thanks for the context...I will get this fixed at the shop asap. But what's the typical tool and size that you use to tighten the crank arm?
Really, there are too many different bottom bracket/crankset versions available for there to be a useful answer to that. Square taper, external hexagonal head - maybe a 15/16 mm socket. Square taper, internal hexagonal head - maybe an 8 mm Allen key/tool bit. Shimano HT II, that's something like a 5/6 mm Allen. Then there is ISIS, HT I etc