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:
Determining compatibility of tire and vehicle load capacities
The sum of four tires’ maximum load ratings must exceed the maximum loaded vehicle
weight (“GVWR”). In addition, sum of the maximum load ratings of two front tires
and of two rear tires must excee ...
California proposition 65 warning
Engine exhaust, some of its constituents, and certain vehicle components contain or emit chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. In a ...
Waxing and polishing
Always wash and dry the vehicle before waxing and polishing.
Use a good quality polish and wax and apply them according to the manufacturer’s instructions. Wax or polish when the painted surface is c ...
