Michelin Challenge Design 2010 - Tire and rim are exchanged as a unit reducing variables such as bead seal and balancing. The unit as a whole is mounted on one drive rim connected to a pneumatic/hydraulic drive system, which is capable of various ride height; level ride, varied torque delivery, and optimal ride height for off road, or highway applications. Sidewall is a separate unit, allowing for a redundant tire system, and easy replacement in case of curb rash. Tires are available in various colors to suit customer style.