[bluetoy]

Really the ring had nothing to do with the wheel coming off. It was because the nuts were left loose or overtightened to the point of stretching the studs. Those plastic rings are really only there to help keep the rim and hub true. There are lots of cars running around from the factory that do not have wheels that fit tightly over the hub. If you have conical lug nuts that is. Lugs with washers like on F-150's need wheels that fit snugly over the hub.