This week at the Geneva Auto Show, Goodyear unveiled its “Aero” concept tire. The wheel is designed to rotate vertically when the car is on the ground and horizontally while flying. The Aero is made from a flexible material and does not need inflating. The bulk of the tire is made up of fins between the hub and the tread. These fins act as propellers as the car transitions, two wheels at a time, between travel modes.