I’ve got a 30.9 seatpost that I want to use in a Boardman CX which takes 31.6.

Can you get shims, and if so what size do I need / what do I google.

Ta

shim 30.9-31.6

or this

http://singletrackworld.com/forum/topic/309-to-316-seatpost-shim-solved

it is a rare size shim but you can get it. Just google 30.9 to 31.6 seat post shim and it will find one .

USE do one, wiggle sell them for a fiver IIRC.

Be careful with shims:

http://singletrackworld.com/forum/topic/warranty-issues-with-devinci2

My use shim was a fiver from winstanleys same size as yours. If you can’t get one I’d sell mine as not using it since changing frames?

Hmm I’ve recently bought a Tailgator for Jnr FD. I was predominantly going to tow him with my Mountain Bike, which is 30.9 So I just bought a 30.9 seat post which I can permanently put the Tailgator bracket on to as its a faffy spanner job.

Im going up to Norhtumberland tomorrow and thought I might actually be better taking the CX bike which is 31.6.

Ive rung round this morning and no one in my area stocks shims, and the cheapest I can get a seat post is £20 !!

Oh well looks like taking a few spanners to take the brack on and off..