Page 545 of 572

cle as specified in the third column
of Table 1 that is appended to the
end of this section.
.Open splice
Any parting at any junction of tread,
sidewall, or innerliner that extends
to cord material.
.Outer diameter
The overall diameter of an inflated
new tire.
.Overall width
The linear distance between the
exteriors of the sidewalls of an
inflated tire, including elevations
due to labeling, decorations, or
protective bands or ribs.
.Passenger car tire
A tire intended for use on passen-
ger cars, multipurpose passenger
vehicles, and trucks, that have a
gross vehicle weight rating (GVWR)
of 10,000 lbs (4,535 kg) or less.
.Ply
A layer of rubber-coated parallel
cords.
.Ply separation
A parting of rubber compoundbetween adjacent plies.
.Pneumatic tire
A mechanical device made of rub-
ber, chemicals, fabric and steel or
other materials, that, when
mounted on an automotive wheel,
provides the traction and contains
the gas or fluid that sustains the
load.
.Production options weight
The combined weight of those
installed regular production options
weighing over 5.1 lbs (2.3 kg) in
excess of those standard items
which they replace, not previously
considered in curb weight or acces-
sory weight, including heavy duty
brakes, ride levelers, roof rack,
heavy duty battery, and special
trim.
.Radial ply tire
A pneumatic tire in which the ply
cords that extend to the beads are
laid at substantially 90 degrees to
the centerline of the tread.
.Recommended inflation pres-
sure
The cold inflation pressure recom-
mended by a vehicle manufacturer.
.Reinforced tire
A tire designed to operate at higher
loads and at higher inflation pres-
sures than the corresponding stan-
dard tire.
.Rim
A metal support for a tire or a tire
and tube assembly upon which the
tire beads are seated.
.Rim diameter
Nominal diameter of the bead seat.
.Rim size designation
Rim diameter and width.
.Rim type designation
The industry of manufacturer’s des-
ignation for a rim by style or code.
.Rim width
Nominal distance between rim
flanges.
.Section width
The linear distance between the
exteriors of the sidewalls of an
inflated tire, excluding elevations
Consumer information and Reporting safety defects/Tire information
–CONTINUED–13-7
Page 546 of 572

Consumer information and Reporting safety defects/Tire information
due to labeling, decoration, or
protective bands.
.Sidewall
That portion of a tire between the
tread and bead.
.Sidewall separation
The parting of the rubber com-
pound from the cord material in
the sidewall.
.Test rim
The rim on which a tire is fitted for
testing, and it may be any rim listed
as appropriate for use with that tire.
.Tread
That portion of a tire that comes
into contact with the road.
.Tread rib
A tread section running circumfer-
entially around a tire.
.Tread separation
Pulling away of the tread from the
tire carcass.
.Treadwear indicators (TWI)
The projections within the principal
grooves designed to give a visual
indication of the degrees of wear of
the tread.
.Vehicle capacity weight
The rated cargo and luggage load
plus 150 lbs (68 kg) times the
vehicle’s designated seating capa-
city.
.Vehicle maximum load on the
tire
Load on an individual tire that is
determined by distributing to each
axle its share of the maximum
loaded vehicle weight and dividing
by two.
.Vehicle normal load on the tire
Load on an individual tire that is
determined by distributing to each
axle its share of the curb weight,
accessory weight, and normal oc-
cupant weight (distributed in accor-
dance with Table 1 that is ap-
pended to the end of this section)
and dividing by 2.
.Wheel-holding fixture
The fixture used to hold the wheel
and tire assembly securely during
testing.
13-8
Page 547 of 572

Table 1—Occupant loading and distribution for vehicle normal load for
various designated seating capacities
Designated seating
capacity, number of
occupantsVehicle normal load,
number of occupantsOccupant distribution in a
normally loaded vehicle
2 through 4 2 2 in front.
5 through 10 32 in front, 1 in second
seat.
11 through 15 52 in front, 1 in second
seat, 1 in third seat, 1 in
fourth seat.
16 through 22 72 in front, 2 in second
seat, 2 in third seat, 1 in
fourth seat.&Tire care–maintenance and
safety practices
.Check on a daily basis that the
tires are free from serious damage,
nails, and stones. At the same time,
check the tires for abnormal wear.
.Inspect the tire tread regularly
and replace the tires before their
tread wear indicators become visi-
ble. When a tire’s tread wear
indicator becomes visible, the tire
is worn beyond the acceptable limit
and must be replaced immediately.
With a tire in this condition, driving
at even low speeds in wet weather
can cause the vehicle to hydro-
plane. Possible resulting loss of
vehicle control can lead to an
accident.
Consumer information and Reporting safety defects/Tire information
–CONTINUED–13-9
Page 548 of 572

Consumer information and Reporting safety defects/Tire information
.To maximize the life of each tire
and ensure that the tires wear
uniformly, it is best to rotate the
tires every 7,500 miles (12,000 km).
Rotating the tires involves switch-
ing the front and rear tires on the
right-hand side of the vehicle and
similarly switching the front and
rear tires on the left-hand side of
the vehicle. (Each tire must be kept
on its original side of the vehicle.)
Replace any damaged or unevenly
worn tire at the time of rotation.
After tire rotation, adjust the tire
pressures and make sure the wheel
nuts are correctly tightened. For
information about the tightening
torque and tightening sequence
for the wheel nuts, refer to“Flat
tires”F9-5
.
&Vehicle load limit–how to
determine
The load capacity of your vehicle is
determined by weight, not by avail-
able cargo space. The load limit of
your vehicle is shown on the
vehicle placard attached to thedriver’s side B-pillar. Locate the
statement“The combined weight
of occupants and cargo should
never exceed XXX kg or XXX lbs”
on your vehicle’s placard.
Thevehicleplacardalsoshows
seating capacity of your vehicle.
The total load capacity includes the
total weight of driver and all pas-
sengers and their belongings, any
cargo, any optional equipment such
as a trailer hitch, roof rack or bike
carrier, etc., and the tongue load of
a trailer. Therefore cargo capacity
can be calculated by the following
method.
Cargo capacity = Load limit−(total
weight of occupants + total weight
of optional equipment + tongue
load of a trailer (if applicable))
For towing capacity information and
weight limits, refer to“Trailer towing
(Outback)”F8-21.
!Calculating total and load ca-
pacities varying seating con-
figurations
Calculate the available load capa-
city as shown in the following
examples:
Example 1A
Vehicle capacity weight of the
vehicle is 800 lbs (363 kg), which
is indicated on the vehicle placard
with the statement“The combined
weight of occupants and cargo
should never exceed 363 kg or
800 lbs”.
For example, if the vehicle has one
13-10
Page 549 of 572
occupant weighing 154 lbs (70 kg)
plus cargo weighing 551 lbs (250
kg).
1.Calculate the total weight.
2.Calculate the available load ca-
pacity by subtracting the total
weight from the vehicle capacity
weight of 800 lbs (363 kg).
3.The result of step 2 shows that a
further 95 lbs (43 kg) of cargo can
be carried.
Example 1B
For example, if a person weighing
176 lbs (80 kg) now enters the
same vehicle (bringing the number
of occupants to two), the calcula-
tions are as follows:
1.Calculate the total weight.
2.Calculate the available load ca-
pacity.
3.The total weight now exceeds
the capacity weight by 81 lbs (37
kg), so the cargo weight must be
reduced by 81 lbs (37 kg) or more.
Example 2A
Vehicle capacity weight of the
vehicle is 800 lbs (363 kg), which
Consumer information and Reporting safety defects/Tire information
–CONTINUED–13-11
Page 550 of 572

Consumer information and Reporting safety defects/Tire information
is indicated on the vehicle placard
with the statement“The combined
weight of occupants and cargo
should never exceed 363 kg or
800 lbs”.
For example, the vehicle has one
occupant weighing 165 lbs (75 kg)
plus cargo weighing 265 lbs (120
kg). In addition, the vehicle is fitted
with a trailer hitch weighing 22 lbs
(10 kg), to which is attached a
trailer weighing 1,764 lbs (800 kg).
10% of the trailer weight is applied
to the trailer tongue (i.e. Tongue
load = 176 lbs (80 kg)).
1.Calculate the total weight.
2.Calculate the available load ca-
pacity.
3.The result of step 2 shows that a
further 172 lbs (78 kg) of cargo can
be carried.
Example 2B
For example, if a person weighing
143 lbs (65 kg) and a child weighing
40 lbs (18 kg) now enter the samevehicle (bringing the number of
occupants to three), and a child
restraint system weighing 11 lbs (5
kg) is installed in the vehicle for the
child to use, the calculations are as
follows:
1.Calculate the total weight.
2.Calculate the available load ca-
pacity.
13-12
Page 551 of 572

3.The total weight now exceeds
the capacity weight by 22 lbs (10
kg), so the cargo weight must be
reduced by 22 lbs (10 kg) or more.
&Determining compatibility of
tire and vehicle load capaci-
ties
The sum of four tires’maximum
load ratings must exceed the max-
imum loaded vehicle weight
(“GVWR”). In addition, sum of the
maximum load ratings of two front
tires and of two rear tires must
exceed each axle’s maximum
loaded capacity (“GAWR”). Original
equipment tires are designed to
fulfill those conditions.
The maximum loaded vehicle
weight is referred to Gross Vehicle
Weight Rating (GVWR). And eachaxle’s maximum loaded capacity is
referred to Gross Axle Weight Rat-
ing (GAWR). The GVWR and each
axle’s GAWR are shown on the
vehicle certification label affixed to
the driver’s door.
The GVWR and front and rear
GAWRs are determined by not only
the maximum load rating of tires but
also loaded capacities of the vehi-
cle’s suspension, axles and other
parts of the body.
Therefore, this means that the
vehicle cannot necessarily be
loaded up to the tire’s maximum
load rating on the tire sidewall.
&Adverse safety conse-
quences of overloading on
handling and stopping and
on tires
Overloading could affect vehicle
handling, stopping distance, vehicle
and tire as shown in the following.
This could lead to an accident and
possibly result in severe personal
injury.
.Vehicle stability will deteriorate.
.Heavy and/or high-mounted
loads could increase the risk of
rollover.
.Stopping distance will increase.
.Brakes could overheat and fail.
.Suspension, bearings, axles and
other parts of the body could break
or experience accelerated wear
that will shorten vehicle life.
.Tires could fail.
.Tread separation could occur.
.Tire could separate from its rim.
&Steps for Determining Cor-
rect Load Limit
1.Locate the statement“The com-
bined weight of occupants and
cargo should never exceed XXX
kg or XXX lbs.”on your vehicle’s
placard.
2.Determine the combined weight
of the driver and passengers that
will be riding in your vehicle.
3.Subtract the combined weight of
the driver and passengers from
XXX kg or XXX lbs.
Consumer information and Reporting safety defects/Tire information
–CONTINUED–13-13
Page 552 of 572

Consumer information and Reporting safety defects/Uniform tire quality grading standards
4.The resulting figure equals the
available amount of cargo and
luggage load capacity. For exam-
ple, if the“XXX”amount equals
1,400 lbs (635 kg) and there will be
five 150 lbs (68 kg) passengers in
your vehicle, the amount of avail-
able cargo and luggage load capa-
city is 650 lbs (1,400−750 (56
150) = 650 lbs).
5.Determine the combined weight
of luggage and cargo being loaded
on the vehicle. That weight may not
safely exceed the available cargo
and luggage load capacity calcu-
lated in Step 4.
6.If your vehicle will be towing a
trailer, load from your trailer will be
transferred to your vehicle. Consult
this manual to determine how this
reduces the available cargo and
luggage load capacity of your ve-
hicle.
Uniform tire quality grading
standards
This information indicates the rela-
tive performance of passenger car
tires in the area of treadwear,
traction, and temperature resis-
tance. This is to aid the consumer
in making an informed choice in the
purchase of tires.
Quality grades can be found where
applicable on the tire sidewall be-
tween tread shoulder and maxi-
mum section width. For example:
Treadwear 200 Traction AA Tem-
perature A
The quality grades apply to new
pneumatic tires for use on passen-
ger cars. However, they do not
apply to deep tread, winter type
snow tires, space-saver or tempor-
ary use spare tires, tires with
nominal rim diameters of 12 inches
or less, or to some limited produc-
tion tires.
All passenger car tires must con-form to Federal Safety Require-
ments in addition to these grades.
&Treadwear
The treadwear grade is a compara-
tive rating based on the wear rate of
the tire when tested under con-
trolled conditions on a specified
government test course.
For example, a tire graded 150
would wear one and one-half (1-
1/2) times as well on the govern-
ment course as a tire graded 100.
The relative performance of tires
depends upon the actual conditions
of their use, however, and may
depart significantly from the norm
due to variations in driving habits,
service practices and differences in
road characteristics and climate.
&Traction AA, A, B, C
The traction grades, from highest to
lowest, are AA, A, B and C. Those
grades represent the tire’s ability to
stop on wet pavement as measured
under controlled conditions on spe-
13-14