Technology
Smart’s airless metal tires are designed for Mars and your bike – CyclingTips
The Smart METL uses a “shape memory alloy” to allow deformation like a pneumatic tire

It will take something special to unseat rubber and air from their perch atop the tire hierarchy.
A company founded by a “Survivor:Fiji” winner and built on technology originally developed for NASA’s various space rovers is the latest to give it a go. The Smart METL tires are, as the name suggests, made of metal, specifically, a nickel-titanium alloy called NiTinol+ arranged in a series of interconnected loops or springs that looks a bit like medieval chainmail.
The material itself is the key innovation….
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