The Amazing Tweel Tire Never Goes Flat
Michelin has invented a tire that needs absolutely no air to stay rigid and will never go flat, no matter how long you use it. Primarily designed for lawn and farm equipment, this innovative wheel can eliminate downtime from flats and create a smoother ride for the user. The internal rubber supports do a great job of absorbing shock, so even large bumps can feel like nothing.
Unfortunately, technology like this can't be applied to larger scale vehicles because the weight would be too great for the wheel to stay round. However, there are a few airless designs on the market currently, but nothing has been adopted in a larger scale just yet.