The hex nuts on the wheel axles of my bicycle are too big for a 5mm Allen key and too small for a 6mm one. What’s the name/size/something of one that would fit? I’ve been googling but to no avail. I know it exists because the shop I got it from had one (but they didn’t know what it was called either or where to buy one from).
Ooh good info. That might be it!
Edit: is that in inches? If yes I guess that’s less than 5mm right? But maybe the next size up is in between 5 and 6
Somewhere between 3/16th inch and 1/4 inch.