Forget having to fill up your car tires ever again. Airless tires are where it’s at. Soon you won’t have to worry about getting flat tires and filling them up to the proper pressure levels. The Uptis (Unique Puncture-proof Tire System) is a line of airless tires that Michelin and GM have teamed up to launch on some consumer vehicles by 2024. This new airless rubber tire is supported by flexible spokes.