Zero-degree belts (under the tread) and proprietary design provide great lateral stiffness, while resisting damage and providing excellent cornering and side-hill stability, High-strength, poly-resin spokes carry the load, absorb impacts and provide a unique energy transfer that reduces the "bounce" associated with pneumatic tires, Michelin's proprietary Comp10 Cable™ forms a semi-rigid "shear beam", and allows the load to hang from the top, No complex mounting equipment needed and once they are bolted on, there is no air pressure to maintain, Designed specifically for difficult environments and conditions, rugged roads and jagged terrain, Airless radial tire is one single unit with a heavy-gauge steel hub, Not certified for use on public roads (NHS), Non-directional tread pattern, Available in flat black, Max Load/Speed 715 lb./50 mph, Lug nut seat type 60 degree conical/tapered