Rubber_Buccaneer
Full Member
I don’t know but I bet 20p they are hex+ and the axle has been deformed so a flat sided key wont go in.
Yup, basically because using a tool that’s not the same shape as the fastener can cause problems, especially in a pretty soft alu “bolt”. (maxles mostly last because the tool usually goes well into it and engages on a huge amount of metal, it’s like having a cap bolt with an absolutely gigantically deep hex, but hex+ won’t do that the same)
IMO the best allen key for most jobs is just a really good quality plain hexagonal one. And without a doubt that’s the case for alu and nylon bolts where size of contact area is everything and any other shaped tool will tend to dig in. Never really quite understood why Wera get so highly recommended on here, but, even I have to admit that there are times I’m very glad I’ve got mine, even if they’re never the first tool I reach for.