What size seat clamp do I need for the above?
The post is 27.2 and after building it up yesterday didnt have the right size. Its not clear on the On one site which of the models I should use. I suspect it is the smaller of the 3 at 29.8 but just wanted some advice before ordering.

Many thanks.

Surfer

It is a 29.8…although a 30.0 will work. Not the easiest of things to find, most places just list 31.8 & 34.9. I bought the On One QR model as they were sold out of the clamps. Works fine, although I ride everything with saddle up, so don't really need a QR.
Love my 456.

Yeah its the 29.8 one.

The hope 30.0 fits ok

Many thanks guys!

I will of course post a pic later as I am feeling quite pleased with myself!

ukbikestore have Hope 30mm in stock – couldn't anyone with any though

I bought the ragley 29.8 for a tenner off CRC. Works very well.