Airless tires

[jessef]

I've seen small clips on a test hummer but never on a civilian vehicle

interesting concept

full of holes (pardon the pun) that could fill up with rocks/muds,etc.. affect balancing.. so many issues but cool nonetheless

[Mr. Flibble]

Only the demo tires have holes. Turns out they are extremely noisy with the holes at highway speeds. The finished retail tires would have normal sidewalls.