Pardon my stupidity for such a noob question. The spec sheet says the seatpost is 30.9mm. What size seatpost clamp do I get? 30mm or 31.8mm?
35mm
I had this question a little while ago. It's not 35 mm. From ATB:
Hi EwanThe size required is 34.9mm.
Best regards
ATB Sales ltd
(I'll admit that 35mm woudl probably work 😉 )
Thanks guys - that's great.
Yep,some might state their clamp as 34.9mm and others,like salsa,35mm.
Remember,dont go for something that looks like it might do the job if its +/- 0.3mm or more and you know its not the exact size you are looking for.If its undersized,you might find that with a little opening of it by hand it will squeeze over the seat tube.The clamp will be stressed and ive seen them pop into pieces before the bike has been ridden..like minutes after its been fitted.If its a 2009/10 rocky ridge its deffo 35mm in salsa sizing.32mm & 36.4mm are the other options from salsa.. so take yer pick!
had one. 34.9 fo shure