If you’ve been a passenger in a luxury car that uses run-flat tires recently, and you suffer from a bad back, you might know just how uncomfortable the puncture-resistent wheels can be. Move instead to a battlefield, however, and the idea of tires that can resist gunshots, impromptu stingers and other debris becomes far more attractive; that’s the concept behind Resilient Technologies’ non-pneumatic tire (NPT) system, a honeycomb of unspecified polymers that, even with 30-percent of the material missing, can still be safely driven on.

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