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:
Cruise control set indicator light
Refer to “Cruise control set indicator light”. ...
Passenger’s frontal airbag ON and OFF indicators
Refer to “Front passenger’s frontal airbag ON and OFF indicators”. ...
Changing the coolant
WARNING
Never attempt to remove the radiator cap until the engine has been shut off and
has cooled down completely. Since the coolant is under pressure, you may suffer
serious burns from a spray ...
