Tweel. French tyre company Michelin has designed a revolutionary Tweel. This is a blend of tyre and wheel . It has no tube, no tyre and no air. The entire wheel is a single piece construction consisting of a tread supported by an intricate pattern of polyurethane which act as spokes. They are deformable, when going over an obstacle and will revert to original shape after passing over it. it will have three times life of present day tyre and can be retreaded
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