Developing Durable Airless Tires for Lunar and Martian Rovers

Returning to the Moon and eventually traveling to Mars requires reinventing rover wheel technology to withstand extreme extraterrestrial conditions. The harsh environments on the Moon and Mars pose significant challenges such as extreme temperature fluctuations, abrasive terrain, and the impossibility of repairing punctures remotely. The Apollo lunar rovers used metal mesh tires that lasted only about 21 miles, but future Artemis missions aim to cover up to 10,000 kilometers over a decade, demanding more durable solutions. Companies like Michelin, Bridgestone, and The Smart Tire Company are developing airless tires made from advanced materials such as high-performance plastics, metal alloys, and shape-memory alloys like nitinol, which can flex and return to their original shape despite extreme cold and rough terrain. Bridgestone’s design mimics camel footpads to distribute weight and prevent sinking in lunar dust, while Michelin tests its tires on volcanic terrain that simulates the Moon’s surface. NASA plans to select from these innovative proposals to equip the Artemis lunar rover missions starting around 2030. These advancements not only support space exploration but may also lead to durable tire technologies for Earth applications, including bicycles and motorcycles designed for rough conditions.