The temperature grade for this tire is established for a tire that
is properly inflated and not overloaded. Excessive speed,
underinflation, or excessive loading, either separately or in
combination, can cause heat buildup and possible tire failure.
TIRES
Tires are designed to give many thousands of miles of service, but they
must be maintained in order to get the maximum benefit from them.
Glossary of tire terminology
•
Tire label:
A label showing the OE (Original Equipment) tire sizes,
recommended inflation pressure and the maximum weight the vehicle
can carry.
•
Tire Identification Number (TIN):
A number on the sidewall of
each tire providing information about the tire brand and
manufacturing plant, tire size and date of manufacturer.
•
Inflation pressure:
A measure of the amount of air in a tire.
•
Standard load:
A class of P-metric or Metric tires designed to carry a
maximum load at 35 psi [37 psi (2.5 bar) for Metric tires]. Increasing
the inflation pressure beyond this pressure will not increase the tires
load carrying capability.
•
Extra load:
A class of P-metric or Metric tires designed to carry a
heavier maximum load at 41 psi [43 psi (2.9 bar) for Metric tires].
Increasing the inflation pressure beyond this pressure will not increase
the tires load carrying capability.
•
kPa:
Kilopascal, a metric unit of air pressure.
•
PSI:
Pounds per square inch, a standard unit of air pressure.
•
B-pillar:
The structural member at the side of the vehicle behind the
front door.
•
Bead area of the tire:
Area of the tire next to the rim.
•
Sidewall of the tire:
Area between the bead area and the tread.
•
Tread area of the tire:
Area of the perimeter of the tire that
contacts the road when mounted on the vehicle.
•
Rim:
The metal support (wheel) for a tire or a tire and tube assembly
upon which the tire beads are seated.
2004 Navigator
(nav)
Owners Guide (post-2002-fmt)
USA English
(fus)
Maintenance and Specifications
348
