I bought a 31.8 Thomson Elite seatpost on craigslist without realizing it was 31.8 and not 31.6. Thomson doesn't even make this size anymore Of course now I am stuck with a weird seatpost that I will never use and will probably find it difficult to unload, but I am curious as to what bikes use this size..? I figure it's gotta be some kind of MTB.

Note: I'm not in anyway a mountain biker.