Tweel from Michelin.

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Nov 21, 2008
The Tweel (a portmanteau of tire and wheel) is anexperimental tire design being developed at Michelin. The tire uses no air and therefore cannot burst or become flat. Instead, the Tweel's hub connects to flexible polyurethane spokes whichare used to support an outer rim and assume the shock-absorbing role of a traditional tire's sidewall.

 
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