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:
SRS side airbag and SRS curtain airbag
The SRS side airbag is stored in the door side of each front seat seatback, which
bears an “SRS AIRBAG” label.
In a moderate to severe side impact collision, the SRS side airbag on the impacted
s ...
Driving on snowy and icy roads
WARNING
Do not use the cruise control on slippery roads such as snowy or icy roads. This
may cause loss of vehicle control.
CAUTION
Avoid prolonged continuous driving in snowstorms. Snow will ent ...
Construction
The generic name of each cord
material used in the plies (both
sidewall and tread area) of this tire.
For example, “PLIES: TREAD 2
STEEL + 2 POLYESTER SIDEWALL
2 POLYESTER” ...
