US Patent 7159454 Method of unseating a tire

The resistance to unseating of at least one tire mounted on a mounting rim and inflated to a predetermined pressure is determined by mounting the tire/rim unit on a vehicle in a steering axle position. The vehicle is set in motion in a straight path and stabilized at a predetermined speed. The steering wheel is then rotated to impose a steering angle which is maintained so that the vehicle travels along a circular trajectory arc. If the tire does not unseat, increases in the steering angle are made periodically so that the vehicle travels in progressively tighter circular trajectory arcs until either the tire becomes unseated or the steering wheel reaches its terminal stop.