To be fair, the concept has been around a long time, however working prototypes are fairly new. Michelin and GoodYear have had their interactions being road tested for the past couple years, modifying the design as per the results of testing. Some changes have included the spokes design and all the rubber composite ratio. Just to be clear, the amount of tires in landfills around the world isn’t small, so these being a success is huge for the planet.