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:
SENSE AND STYLE
Family Friendly (Not Really, Fair, Great, Excellent): Not Really
Fun-Factor (None, Some, Good Times, Groove-On): Good Times ...
Before checking or servicing in the engine compartment
WARNING
● Always stop the engine and apply the parking brake to prevent the vehicle from
moving.
● Always let the engine cool down. Engine parts become very hot when the engine
is ru ...
Before starting out on a trip
● Check that the vehicle and vehicle-tohitch mounting are in good condition.
If any problems are apparent, do not tow the trailer.
● Check that the vehicle sits horizontally with the tr ...
