C Spanner Size Question

[Skybone]

Hey folks, wonder if anyone can shine any light on this relatively simple query for me...

I'm looking at doing some tinkering to the TRX (while the Triple's away getting fixed), first job is to loosen the shock from it's current setting of 7 on the preload to something with a wee bit more "give". The bike rides fine on 7, it's just a bit unforgiving.

What size C Spanner do I need to look for?

Are adjustable C's worth looking at?

Ta muchly.

[Mincehead]

Yep, just buy an adjustable type :

http://tools.twenga.co.uk/#q=C%20spanner&u=q&nas=1

[trixynut]

Ive got three of the damn things.
Allso useful for doing up the head bearing lock nuts.
Send me your address and a couple of quid for postage and you can have one.