Uniform Tire Quality Grading Standards

A uniform standard to grade the quality of tires with regards to tread quality, tire traction and temperature characteristics. Ratings are determined by tire manufacturers using U.S. government testing procedures. The ratings are molded into the sidewall of the tire.

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    Lowering the vehicle
    Turn the crank of the jack counterclockwise until the vehicle is once again standing firmly on the ground. Place the jack to one side. Tighten the wheel bolts evenly in a crosswise patt ...

    Number of seats
    The specifications shown on the Tire and Loading Information placard in the illustration are examples. The number of seats is vehicle-specific and can differ from the details shown. The number ...

    Drinking and driving
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