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:
Tire labeling
Many markings (e.g. Tire size, Tire Identification Number or TIN) are placed on the sidewall of a tire by tire manufacturers. These markings can provide you with useful information on the tire. ...
Vehicle capacity weight
The load capacity of your vehicle is determined by weight, not by available cargo
space. The maximum load you can carry in your vehicle is shown on the vehicle placard
attached to the driver’s ...
Tire Identification Number (TIN)
Tire Identification Number (TIN) is marked on the intended outboard sidewall.
The TIN is composed of four groups. Here is a brief review of the TIN with a breakdown
of its individual elements.
...