An airless, puncture-proof car tyre takes to the road

PUNCTURES ALWAYSGM seem to strike at the most irksome times. Scrambling around on the ground to change a wheel in the wet on the side of a busy road is a sure way to ruin any journey. And punctures can be extremely dangerous, especially if a tyre blows out at high speed on a motorway. For decades carmakers have sought various solutions, but with new materials and novel manufacturing methods, a genuinely puncture-proof car tyre has finally appeared.This summer Michelin and General Motors () will begin testing a prototype airless tyre on a fleet of Chevrolet Bolt electric cars. Although it does not need to be inflated, the self-supporting tyre is said to produce the ride and handling of a standard pneumatic tyre. And being airless, it is thus immune from punctures. The French tyremaker and the American car giant call the tyre Uptis (for “unique puncture-proof tyre system). Provided the trials in Michigan go well, the two partners reckon Uptis tyres could be available for cars by 2024.