The seat clamp size for a pre 2010 orange 5?

http://www.orangebikes.co.uk/bikes/2011/five_frame/

30.9 is the internal diam.

Um that's the 2011 is it not. 2010 is 27.2.

indeed it is. I stand corrected like a man in orthopaedic shoes!

Oops I mean the outside diam

My P7 is 27.2 internal and has a 30mm hope clamp on it

The P7 is steel, so the tube is thinner walled.

The Five although also 27.2 takes a bigger clamp – but unhelpfully I can't remember how big.

EDIT: 31.8

Model Year S/tube S/post FrntMch BBShell Max Disc Rotor S/postClamp

Five 04-10 27.2 27.2 31.8 73 180 31.8

Thanks very much very helpful