Stompier
Senior Member
I have some rather nice Facom t handled hex keys that I bought individually for the most common sizes, to cover everything else I have a set of Teng's. To be honest on a bike, you probably don't need the highest of quality, but I would stay away from the really cheap, made of cheese ones and also try and avoid using a ball end if you can help it.
Teng and Wera both at Screwfix, so I will make the trip a bit later.
Agreed that in general, pretty much anything will do for occasional use. However, these are for track use, where stems, bars and - in particular - chain rings can get swapped several times per session. So the chain ring bolts themselves can quickly lose their edges if the hex keys are poor quality. They will wear anyway, but at least the rate will be lower with a decent set.