Well after another strip down here is what I have found...
- BB is fine XTR and brand new
- Chainring bolts all tight
- Still makes the creak/crack with the seat post removed
- Greased pedal threads
- Rear dropouts tight
BUT...when I changed the rear wheel for another (albeit a 26"!) the creaking stopped! My thoughts are now that it could be the freehub on the rear wheel...it spins quite stiff but with no play, but does sound a bit grawnchy when listened to close up. How ever I have a big fear now that the freehub looks like an integral part of the hub!! Therefore not sure that I will be able to just change the freehub and it might be a whole new hub and wheel re-build!!
The hub is a Bontrager rxl and the number on the freehub is FH-68-P5 (see pics)
Any ideas if I can just change the freehub?