GM and Michelin testing airless, flat-proof tires

General Motors is working with Michelin on an airless tire design that may have drivers simply laughing at potholes and other road hazards that commonly cause flats. The auto manufacturer and supplier have named the line "Uptis" and are running tests on a fleet of Chevy Bolt EVs. If successful, the flat-resistant tires could be commercially available in 2024.