Need help quick - What size is allen key on wheel sensor?

[dackjaniels]

Hi,

I'm in the middle of doing the rear wheel sensor and can't seem to find an allen key to fit.
Shining a torch through the wheel bolt hole I can see what looks like an allen key head on the screw but none seem to fit.
Does anybody know know the size off hand?

Thanks,
Steve

[matt268uk]

I seem to remember it being a 5mm,if not its a 6 they get alittle corroded which makes them seem smaller than they are,you may need to tap it in gently
Just checked my set,its a 5mm

[Gibbo]

For some reason 6mm springs to mind but I'm not certain. It does need to be a long key though.

I'm sure I wrote a walk-through on cleaning them.

[dackjaniels]

I decided to go out and give it another go before seeing your replies and sure enough, it is a 5 mm allen key. The reason it didn't fit is as Matt said, it was a bit clogged/corroded and needed to be tapped in.

My allen key was only just long enough on its longest side so I had to hook the wheel wrench over the protruding short end to get enough torque to undo but all went well from there.

Thank you both