
For U.S.A............................................................ 13-2
Tire information .................................................. 13-2
Tire labeling ....................................................... 13-2
Recommended tire inflation pressure .................. 13-4
Glossary of tire terminology ............................... 13-5
Tire care –maintenance and safety practices ...... 13-9
Vehicle load limit –how to determine ................ 13-10
Determining compatibility of tire and vehicle load capacities ............................................... 13-13 Adverse safety consequences of overloading
on handling and stopping and on tires ........... 13-13
Steps for Determining Correct Load Limit ......... 13-13
Uniform tire quality grading standards .......... 13-14
Treadwear ....................................................... 13-14
Traction AA, A, B, C ......................................... 13-14
Temperature A, B, C ......................................... 13-15
Reporting safety defects (USA) ...................... 13-15
Consumer information and Reporting safety defects
13

13-2Consumer information and Reporting safety defects
For U.S.A.
The following information has been
compiled according to Code of
Federal Regulations “Title 49, Part
575 ”. Tire information &
Tire labeling
Many markings (e.g. Tire size, Tire
Identification Number or TIN) are
placed on the sidewall of a tire by
tire manufacturers. These marking
can provide you with useful infor-
mation on the tire. ! Tire size
Your vehicle comes equipped with
P-Metric tire size. It is important to
understand the sizing system in
selecting the proper tire for your
vehicles. Here is a brief review of
the tire sizing system with a break-
down of its individual elements. ! 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 dimen-
sional information about the tiresize. Example:
(1) P = Certain tire type used on
light duty vehicles such as passen-
ger cars
(2) Section Width in millimeters
(3) Aspect Ratio (= section height 7
section width).
(4) R = Radial Construction
(5) Rim diameter in inches ! Load and Speed Rating Descrip- tions
The load and speed rating descrip-
tions will appear following the size designation.
They provide two important facts
about the tire. First, the number
designation is its load index. Sec-
ond, the letter designation indicates
the tire ’s speed rating.

Example:
(6) Load Index: A numerical code
which specifies the maximum load
a tire can carry at the speed
indicated by its speed symbol, at
maximum inflation pressure.
For example,“91 ”means 1,356 lbs
(615 kg), “90 ”means 1,323 lbs (600
kg), “89 ”means 1,279 lbs (580 kg)
WARNING
Load indices apply only to the
tire, not to the vehicle. Putting
a load rated tire on any vehicle
does not mean the vehicle can
be loaded up to the tire ’s rated
load.
(7) Speed Rating: An alphabetical
system describing a tire ’s capability
to travel at established and prede-
termined speeds.
For example, “V ” means 149 mph
(240 km/h)
WARNING
. Speed ratings apply only to
the tire, not to the vehicle.
Putting a speed rated tire on
any vehicle does not mean
the vehicle can be operated
at the tire ’s rated speed.
. The speed rating is void if
the tires are worn out, da-
maged, repaired, retreaded,
or otherwise altered from
their original condition. If
tires are repaired, re-
treaded, or otherwise al-
tered, they may not be sui-
table for original equipment
tire designed loads andspeeds.
! Tire Identification Number (TIN)
Tire Identification Number (TIN) is
marked on the intended outboard
sidewall. The TIN is composed of
four groups. Here is a brief review
of the TIN with a breakdown of its
individual elements.
(1) Manufacturer ’s Identification
Mark
(2) Tire Size
(3) Tire Type Code
(4) Date of Manufacture
The first two figures identify the
week, starting with “01 ”to represent
the first full week of the calendar
year; the second two figures repre-
sent the year. For example, 0101
means the 1st week of 2001.
! Other markings
The following makings are also
placed on the sidewall. ! Maximum permissible inflation
pressure
The maximum cold inflation pres-
sure to which this tire may be
inflated. For example, “350 kPa
(51 PSI) MAX. PRESS ”
Consumer information and Reporting safety defects
13-3
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13-4Consumer information and Reporting safety defects
!Maximum load rating
The load rating at the maximum
permissible weight load for this tire.
For example, “MAX. LOAD 615 kg
(1,356 LBS) @ 350 kPa (51 PSI)
MAX. PRESS. ”
WARNING
Maximum load rating applies
only to the tire, not to the
vehicle. Putting a load rated
tire on any vehicle does not
mean the vehicle can be
loaded up to the tire ’s rated
load.
! Construction type
Applicable construction of this tire.
For example, “TUBELESS STEEL
BELTED RADIAL ”
! 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 + 1
NYLON SIDEWALL 2 POLYE- STER
”
! Uniform Tire Quality Grading (UTQG)
For details, refer to “Uniform tire
quality grading standards ”F 13-14 .
& Recommended tire inflation pressure
! Recommended cold tire infla-
tion pressure
For the recommended cold tire
inflation pressure for your vehicle ’s
tires, refer to “Tires ”F 12-9 . !
Vehicle placard
The vehicle placard is affixed to the driver ’s side B-pillar.
Example:

The vehicle placard shows original
tire size, recommended cold tire
inflation pressure on each tire at
maximum loaded vehicle weight,
seating capacity and loading infor-mation. !Adverse safety consequences
of under-inflation
Driving at high speeds with exces-
sively low tire pressures can cause
the tires to flex severely and to
rapidly become hot. A sharp in-
crease in temperature could cause
tread separation, and failure of the
tire(s). Possible resulting loss of
vehicle control could lead to anaccident. ! Measuring and adjusting air
pressure to achieve proper in-
flation
Check and, if necessary, adjust the
pressure of each tire (including the
spare) at least once a month and
before any long journey. Check the
tire pressures when the tires are
cold. Use a pressure gauge to
adjust the tire pressures to the specific values. Driving even a
short distance warms up the tires
and increases the tire pressures.
Also, the tire pressures are affected
by the outside temperature. It is
best to check tire pressure out-
doors before driving the vehicle.
When a tire becomes warm, the air
inside it expands, causing the tire
pressure to increase. Be careful not
to mistakenly release air from a
warm tire to reduce its pressure.
& Glossary of tire terminology
. Accessory weight
The combined weight (in excess of
those standard items which may be
replaced) of automatic transmis-
sion, power steering, power brakes,
power windows, power seats, radio,
and heater, to the extent that these
items are available as factory-in-
stalled equipment (whether in-
stalled or not). . Bead
The part of the tire that is made of
steel wires, wrapped or reinforced by ply cords and that is shaped to fit
the rim. .
Bead separation
A breakdown of the bond between
components in the bead.. Bias ply tire
A pneumatic tire in which the ply
cords that extend to the beads are
laid at alternate angles substantially
less than 90 degrees to the center-
line of the tread. . Carcass
The tire structure, except tread and
sidewall rubber which, when in-
flated, bears the load.. Chunking
The breaking away of pieces of the
tread or sidewall.. Cold tire pressure
The pressure in a tire that has been
driven less than 1 mile or has been
standing for three hours or more.. Cord
The strands forming the plies in thetire.. Cord separation
The parting of cords from adjacent
Consumer information and Reporting safety defects
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Table 1—Occupant loading and distribution for vehicle normal load for
various designated seating capacities
Designated seating
capacity, number of
occupants Vehicle normal load,
number of occupants Occupant distribution in a
normally loaded vehicle
2 through 4 2 2 in front.
5 through 10 3 2 in front, 1 in second seat.
11 through 15 5 2 in front, 1 in second
seat, 1 in third seat, 1 in
fourth seat.
16 through 22 7 2 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 anaccident.
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13-10Consumer information and Reporting safety defects
. 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 ”F 9-6 .
& 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 the driver
’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 tow-
ing ”F 8-19 . !
Calculating total and load ca-
pacities varying seating con-
figurations
Calculate the available load capa-
city as shown in the followingexamples:
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

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 each axle
’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
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