NASA-Inspired Airless Bicycle Tires Are Now Available

The Ohio-based Smart Tire Company has started a Kickstarter campaign for its shape memory airless bicycle tires that were created in partnership with NASA. New Atlas reports: At the heart of each Metl tire is a Slinky-like spring that runs all the way around the tire. That spring is made of a shape memory nickel-titanium alloy known as NiTinol, which is described as being strong like titanium yet also stretchy like rubber. Importantly, when NiTinol is placed under pressure, it initially deforms