Re: 30.9 x 400mm seat post
Got a brand new OnOne Twelfty, looks like a Thompson, took it out of my new bike and replaced it because it's inline and I prefer layback. It's got some faint scratching, where it was pushed down into the frame for posting. This is the MTB version, not the Sport, and retails at £29.99. Will do it for £18 posted.