Michelin's concept tire comes wrapped in "rechargeable" 3D-printed treads

Michelin's concept tire comes wrapped in "rechargeable" 3D-printed treads

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The core of the tire, which also functions as a wheel and can be reused, would be made from organic materials that are bio-sourced and biodegradable. 3D printing allows the amount of rubber tread applied on the outside of the tire to be optimized to meet the specific needs of the driver while keeping the amount of rubber required to a minimum – and the tread can even be topped up, or "recharged," when it wears down or the driver is headed for different road conditions.