it's branded on the side….i'm lookin for a quick release to replace it but can't find any at 34 mm what size do i need…………..

i bet i look stoopid now!!!!

A frame ID would be a good idea

mine does as well, but it's sold as a 34.9 and it fit's my 34.9 seat tube a treat.

i got one of these, it works really well – better than hope and on-one unit's i've used!

http://www.merlincycles.co.uk/mountain-bike-seatpost-collars/systemex-q-r-collar.html

Bianch M.U.T.T from '06ish………it's just the commuter so i'm not lookin at spendin loads on it.

What size seatpost (not a guarantee but you can usually get a rough idea of the seat clamp from the seatpost size) – if it's 30.9 or 31.6 then it's most likely a 34.9 seat clamp.

34.9 it is!

cheers peeps