I was taking my d/s crank arm off today with the 8mm hex as normal, however when the last few threads before the crank came off the 16mm end cap started to unscrew too

No problem i thought, but it is, where on earth do i get a 16mm allen key from? I could only do it up finger tight when i put it back together, so not the 20nm it reuqires, there was no play when all fitted back up, but its only finger tight so id like to sort it properly

Use 2 8mm ones 🙂

Got a 1/2 drive socket 16mm hex from eBay the other week , was about £6-7 delivered

Race Face 16mm Hex adaptor

Ahhhh dovebiker! Nice one obviously they made an adaptor for fools like me

Now where to get one from a quick google hasnt found any shops selling this tool

http://www.uktools.com/16mm-50mm-long-1234drive-hex-bit-socket-stubby-p-38915.html

Cheers ben will that just fit onto another wrench i take it?

Yep standard half inch socket set will do it.

Just ordered one thanks ben got one off ebay for 6 quid

I too need one of these! Thanks for the tip

Many thanks, guys. Just what I was looking for.

I ended up using a 14mm box spanner that I’d just bought to tighten a tap, turns out it”s outer width is 15.94mm and so worked a treat.