P Metric

With the P-Metric system, Section Width is measured in millimeters.

To convert millimeters into inches, divide by 25.4. The Aspect Ratio (Section Height divided by Section Width) helps provide more dimensional information about the tire size.

Example:

(1) P = Certain tire type used on light duty vehicles such as passenger

(1) P = Certain tire type used on light duty vehicles such as passenger cars
(2) Section Width in millimeters
(3) Aspect Ratio (= section height 7 section width).
(4) R = Radial Construction
(5) Rim diameter in inches

    See also:

    Maximum allowable speeds
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    GVWR and GAWR (Gross Vehicle Weight Rating and Gross Axle Weight Rating)
    The certification label attached to the driver’s side doorjamb shows GVWR (Gross Vehicle Weight Rating) and GAWR (Gross Axle Weight Rating). The GVW (Gross Vehicle Weight) must never exce ...

    Hill start assist warning light
    While the engine is rotating, if there are any malfunctions in the Hill start assist system, the light will illuminate. When the Hill start assist warning light illuminates, have the vehicle insp ...