I can't help but wonder how
I can't help but wonder how those spaces in the tire will perform in Michigan winters when snow packs in and freezes; not to mention the issue of keeping them clean after a rain and a dirt road. Whil eopen it may look cool, question is, can it be enclosed?
Still, not having to monitor tire pressure would be great win for all. (By the way, good catch, as I noticed this when I researched that Chinese tire maker that will make tires with colors other than black.)