Set them up on my wife's 5-spot this weekend and we took a ride yesterday, she was nice enough to give me some time on her 5-Spot and wow is that thing light compared to my hefty RFX. Tires are the easiest to set up on a UST rim I've tried to date, stupidly easy. They roll really nice even when laying the bike over. Traction was good as good can be in the middle of winter in New England going from snow to ice to frozen solid earth. And they are light, don't know what the claimed weight is but set up as UST on a x823 DH rim the whole wheel felt lighter than any rear wheel I've set up in a long time. Time will tell how tough the sidewall is, I had aweful experience with tubeless tires on my trail bike last year, mostly slamming the rim. Tried everything from a 630g Conti Vertical Pro 2.3 to a 1000g Specialized Roller Pro 2.4 and although the Roller Pro is tougher I still bang the rims an aweful lot. I was going to try the Hutchi Octopus this year but may try these new Michelin AM tires myself.