It features a reinforced internal structure, which keeps The model's best shape under load and driving pressure, even after air pressure loss happens. The model ensures a 50-mile, 50-mph performance once air pressure leaves the tire. Run flat tires prevent the vehicle from being stranded on the side of the road since the model can be driven on for a short while. These tires should not be mixed on the same vehicle as regular tires, as their structure makes them heavier.