Rodgard Runflat – designed for one-piece wheels and made from lightweight, high strength, and engineered polymer consisting of two main components, …a roller and an insert base. The base unit is securely attached to the wheel in the drop center, and provides a track or channel in which the roller is allowed to move or "rotate" about the wheel at the same speed as the tire, thus reducing friction and heat build up. The Rodgard runflat has unique properties that make it resistant to crack propagation and deterioration from ballistic attack or road hazards.