They have been sneak-a-peeking those for a couple of years, but they are just starting to get to the point of beta-testing now. They still have a ways to go but it doesn't seem like a bad idea to me. And why would you need to air down? Airing down is about increasing contact patch and therefore traction, but these already deflect better than pneumatic tires, so airing down is irrelevant if you are running these. History shows that the first pneumatic tires were also laughed at and complained about. Now, we can't imagine running without them. Innovations take time, money and vision. Michelin has ample access to all three and will undoubtedly only improve this design. I can see how they would be of great use to mining trucks if they can make them apply in that situation. Why nay-say that which is brand new? Afraid of change?