Hi, I have a Kona Thumb seatpost on my current bike. I'm thinking of buying a carbon seatpost to replace it. I've found this. http://www.probikekit.com/display.php?code=k0262 I'm not sure on the dimensions of the Kona Thumb. According to this it's 300mmx350mm http://cgi.ebay.com/New-OEM-Kona-Thumb-30-0mmx350mm-Seatpost-/140397520690 Thus I think the carbon fibre one may fit. Does anyone know of anywhere where I can get more trustworthy specs?