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
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:
Parking on a grade
Always block the wheels under both
vehicle and trailer when parking. Apply
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Your vehicle employs an electric cooling fan which is thermostatically controlled
to operate when the engine coolant reaches a specific temperature.
If the radiator cooling fan does not operate eve ...
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Refer to “Electrical system” F12-8. ...
