Proper Speed Rating
If the vehicle’s tire placard and/or owner's manual specify speed-rated tires, the replacement tires must have the same or higher speed rating to maintain vehicle speed capability. When replacing your tires, consult the vehicle’s tire placard or the owner's manual for the correct size. If the tires shown on the vehicle tire placard do not have speed ratings, the appropriate-size tire with any speed rating may be applied. When the placard tire size contains a speed symbol – for example, P205/55HR16 or P205/55R16 91H – the replacement tire must have the same or higher speed-rating symbol if the speed capability of the vehicle is to be maintained. If the replacement tire is not speed rated, the speed capability of the vehicle is limited by the speed capability of the replacement tire. A Mastercraft-produced non-speed-rated passenger tire's maximum speed is 85 mph (137 km/h).
Tire speed ratings do not imply that vehicles can be safely driven at the maximum speed for which the tire is rated, particularly under adverse road and weather conditions, or if the vehicle has unusual characteristics. Never operate a vehicle in an unsafe or unlawful manner.
If replacement tires have lower speed capability than specified by the vehicle manufacturer, the vehicle's speed must be restricted to that of the replacement tire. Also, vehicle handling could be affected. Consult the vehicle manufacturer for recommendations.