I am in need of a seat post clamp to finish off all the bits for my build. Unfortunately I chose a silly sized seat tube (31.6 ID, 34.1 OD) and I can not find anywhere that sells a seatpost clamp in that size.

It appears that genesis supply one with some of their bikes but otherwise – not a clue.

Is there a shop that is likely to sell them or am I going to have to go down the home made route?

have a chat with 18-bikes – they stock Genesis and maybe able to source a ‘spare’ seatclamp for them?

I’ve found Petra Cycles and SJS handy in the past for odd bits like that.