Looks like research into auto airless tires is accelerating, with Hankook being the latest tire company to join the fray and publish info. You can search the web and get lots of info, photos, etc. No prices yet! This must be of interest to all spare-less car owners (eg. Solstice, BMW M3, etc.). Concept is great; looks not so much. No data that I can find on high-speed performance. Comments all you experts?