The METL™ bicycle tire is a non-pneumatic (aka “airless”0 tire made from shape memory alloys, the same materials being researched by NASA for future lunar and Martian rover missions. Due to the elasticity and high energy return of these unique alloys, METL is the first airless tire to feature low rolling resistance and a smooth ride for cyclists, in addition to eliminating flats. The tires come with integrated rubber treads and may be retreaded, making for a more sustainable solution that uses less rubber and produces less waste. Safety is also improved through consistent, even contact with the road.