I've got a 31.8 diameter Thomson seatpost that came out of my Intense 5.5 which according to its geo chart should take a 31.6. I bought the bike at my LBS, new and already built up. A buddy of mine just bought a Mojo with a Joplin and wanted to borrow my Thomson because he doesn't do adjustable posts. So, who knows the story on the 31.8 Thomson posts and why will it fit my 5.5 and not his Mojo. I've searched MTBR and the web and it is like they shouldn't exist. I did see one on ebay (250666040263) and the listing says that they were rare and made for certain bikes. Just curious if anyone has seen this. Thanks.