So its funny this came up. My neighbor works for mickey thompson in stow ohio as the head of the race division so ive known these have been coming now for about 3 years. They developed this tire for the rzr bouncer stuff from what i gathered. I got to c a set of 32s last year on a 15" rim on a xrc canam he had. So i assure u they will have 15s. Here in ohio the lack of people that want to work drastically effected this tire coming out and the release of all the sizes. Im pretty sure he told me the will have 28 to 36" tires in 14 and 15" rim. They are very heavy and have absolutely massive lugs on them so marts longevity could be a issue with running them. I think they will b on par or just a bit heavier than the xtr370 lineup but much more aggressive.
They look like badass tires. The site says "Sticky competition compound provides ultimate grip on hard surfaces." I'm curious how they'd compare to the Roxxzilla stickies. I know tread design is subjective. But, I really wish tire manufacturers would advertise the hardness (durometer) of their rubber compounds.