Not the most exciting bike part, unless you snap it, but I am looking for a post. It must be 27.2, will have an extension of 32cm or so including saddle, and I would prefer 10cm of post inside the frame, so that means I reckon I need a post of at least 38cm. It will be for general xc use. I weigh about 75kg. So can you get strong light and cheap (and confey)? I am considering Easton EA70, a Twelfty, or something from Ritchey... or should I get a Thompson? I do have a 350mm USE Alien Ti, but I am nervous about using it with so much extension (and prob only 7cm in the frame).