Page 280 of 454

TIRE SAFETY INFORMATION
Tire Markings
NOTE:
²P (Passenger)-Metric tire sizing is based on U.S. design
standards. P-Metric tires have the letter ªPº molded
into the sidewall preceding the size designation. Ex-
ample: P215/65R15 95H.
²European Metric tire sizing is based on European
design standards. Tires designed to this standard have
the tire size molded into the sidewall beginning with
the section width. The letter9P9is absent from this tire
size designation. Example: 215/65R15 96H
²LT (Light Truck)-Metric tire sizing is based on U.S.
design standards. The size designation for LT-Metric
tires is the same as for P-Metric tires except for the
letters ªLTº that are molded into the sidewall preced-
ing the size designation. Example: LT235/85R16.
²Temporary Spare tires are high-pressure compact
spares designed for temporary emergency use only.
Tires designed to this standard have the letter ªTº
molded into the sidewall preceding the size designa-
tion. Example: T145/80D18 103M.
²High Flotation tire sizing is based on U.S. design
standards and it begins with the tire diameter molded
into the sidewall. Example: 31x10.5 R15 LT.
280 STARTING AND OPERATING
Page 281 of 454
Tire Sizing Chart
EXAMPLE:
Size Designation:
P= Passenger car tire size based on U.S. design standards
(....blank....(= Passenger car tire based on European design standards
LT= Light Truck tire based on U.S. design standards
T= Temporary Spare tire
31= Overall Diameter in Inches (in)
215= Section Width in Millimeters (mm)
65= Aspect Ratio in Percent (%)
ÐRatio of section height to section width of tire
10.5= Section Width in Inches (in)
R= Construction Code
Ð9R9means Radial Construction
Ð9D9means Diagonal or Bias Construction
15= Rim Diameter in Inches (in)
STARTING AND OPERATING 281
5
Page 323 of 454

weighed in combination. (Note that GCWR ratings in-
clude a 150 lbs (68 kg) allowance for the presence of a
driver).
Gross Axle Weight Rating (GAWR)
The Gross Axle Weight Rating (GAWR) is the maximum
capacity of the front and rear axles. Distribute the load
over the front and rear axles evenly. Make sure that you
do not exceed either front or rear GAWR.
WARNING!
It is important that you do not exceed the maximum
front or rear GAWR. A dangerous driving condition
can result if either rating is exceeded. You could lose
control of the vehicle and have an accident.
Tongue Weight (TW)
Tongue Weight (TW) is the downward force exerted on
the hitch ball by the trailer. In most cases it should not be
less than or more than 10% of the trailer load. You must
consider this as part of the load on your vehicle.
Frontal Area
Frontal Area is the maximum height and maximum
width of the front of a trailer and its cargo.
Weight-Carrying Hitch
A weight-carrying hitch supports the trailer tongue
weight, just as if it were luggage located at a hitch ball or
some other connecting point of the truck. These kinds of
hitches are the most popular on the market today and
they're commonly used to tow small- and medium-sized
trailers.
STARTING AND OPERATING 323
5