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Always replace rims and tires with the same designation, manufacturer and type as shown on the original part. G WARNING Do not overload the tires by exceeding the specified load limit as indicated on the Tire and Loading Information placard on the driver’s door B‑pillar. Overloading the tires can overheat them, possibly causing a blowout. Overloading the tires can also result in handling or steering problems, or brake failure. Tire load rating A is a numerical code associated with the maximum load a tire can support. sponds to a maximum load of 1356 lbs (615 kg) the tire is designed to support. Y page 136) where the maximum load associated with the load index is indicated in kilograms and lbs. rating, see “Load identification” ( Y page 142). Tire speed rating G WARNING Even when permitted by law, never operate a vehicle at speeds greater than the maximum speed rating of the tires. tires are rated can lead to sudden tire fail- ure, causing loss of vehicle control and possibly resulting in an accident and/or personal injury and possible death, for you and for others. Regardless of the tire speed rating, local speed limits should be obeyed. Use prudent driving speeds appropriate to prevailing conditions. approved maximum speed for the tire. Summer tires Index Speed rating Q up to 100 mph (160 km/h) R up to 106 mph (170 km/h) S up to 112 mph (180 km/h) T up to 118 mph (190 km/h) H up to 130 mph (210 km/h) V up to 149 mph (240 km/h) W up to 168 mph (270 km/h) Y up to 186 mph (300 km/h) ZR...Y above 186 mph (300 km/h) ZR...(Y) above 186 mph (300 km/h) ZR above 149 mph (240 km/h) R At the tire manufacturer’s option, any tire with a speed capability above 149 mph (240 km/h) can include a “ZR” in the size designation (for example: 245/40 ZR18). To determine the maximum speed capability of the tire, the service description for the tire must be referred to. tire load rating A and tire speed rating B. designation and no service description is given, the tire manufacturer must be consulted for the maximum speed capa- bility. speed capability is limited by the speed symbol in the service description. Example: 245/40 ZR18 97Y. description. The letter “Y” designates the speed rating and the speed capabil- Tires and wheels 141 >> Operation. Z |