Story

As many people on the internet, I mostly comment to gripe (not really, but sometimes yes).

Run-flat tires use air. They merely have a system - ribs like these tires have, reinforced sidewalls, reinforced tread liners, and/or less commonly a smaller non-pneumatic tire on the inside - to allow them to continue working in some sense when the air is let out, typically through a puncture or leak.

Also, I expect commercial versions on non-pneumatic tires to not be open-air like those pictured. I would expect there to be dangerous situations where rocks could get lodged inside and shot out at high velocities under pressure.

Alright, I'm done griping.