United States Department of
Transportation Tire Quality
Grades
The United States of America
Department of Transportation
requires Ford Motor Company to
give you the following information
about tire grades exactly as the
government has written it.
Treadwear
The treadwear grade is a
comparative rating based on the
wear rate of the tire when tested
under controlled conditions on a
specified government test course.
For example, a tire graded 150
would wear 1½ times as well on
the government 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
WARNING: The traction
grade assigned to this tire is based
on straight-ahead braking traction
tests, and does not include
acceleration, cornering,
hydroplaning or peak traction
characteristics. The traction grades, from highest
to lowest are AA, A, B, and C. The
grades represent the tire
’s ability
to stop on wet pavement as
measured under controlled
conditions on specified
government test surfaces of
asphalt and concrete. A tire
marked C may have poor traction
performance.
Temperature A B C WARNING: 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.
The temperature grades are A
(the highest), B and C,
representing the tire ’s resistance
to the generation of heat and its
ability to dissipate heat when
tested under controlled conditions
on a specified indoor laboratory
test wheel. Sustained high
temperature can cause the
material of the tire to degenerate
and reduce tire life, and excessive
temperature can lead to sudden
tire failure. The grade C
corresponds to a level of
performance which all passenger
car tires must meet under the
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the driver door. The cold
inflation pressure should
never be set lower than
the recommended
pressure on the vehicle
label.
Tire speed ratings
mph ( km/h)
Letter
rating
81 mph (130 km/h)
M
87 mph (140 km/h)
N
99 mph (159 km/h)
Q
106 mph (171 km/h)
R
112 mph (180 km/h)
S
118 mph (190 km/h)
T
124 mph (200 km/h)
U
130 mph (210 km/h)
H
149 mph (240 km/h)
V
168 mph (270 km/h)
W
186 mph (299 km/h)
Y
Note: For tires with a maximum
speed capability over 149 mph
(240 km/h), tire manufacturers
sometimes use the letters ZR. For
those with a maximum speed
capability over 186 mph (299
km/h), tire manufacturers always
use the letters ZR. Note:
If the tire size does not begin
with a letter, this may mean it is
designated by either ETRTO
(European Tire and Rim Technical
Organization) or JATMA (Japan Tire
Manufacturing Association). You
may not find this information on all
tires because it is not required by
federal law.
Note: The tire suppliers may have
additional markings, notes or
warnings, for example standard
load, radial tubeless, etc.
T Type Tires
T145/80D16 is an example of a
tire size. T type tires have some
additional information beyond
those of P type tires. The
definitions of these items are
listed below.
Note: The temporary tire size for
your vehicle may be different from
this example. Tire Quality Grades
do not apply to this type of tire.
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United States of America DOT
Tire Identification Number
(TIN)
United States of America, and
Canada Federal regulations
require tire manufacturers to place
standardized information on the
sidewall of all tires. This
information identifies and
describes the fundamental
characteristics of the tire and also
provides a United States of
America DOT Tire Identification
Number for safety standard
certification and in case of a recall.
This begins with the letters DOT
and indicates that the tire meets
all federal standards. The next
two numbers or letters are the
plant code designating where it
was manufactured, the next two
are the tire size code and the last
four numbers represent the week
and year the tire was built. For
example, the numbers 317 mean
the 31st week of 1997. After 2000
the numbers go to four digits. For
example, 2501 means the 25th
week of 2001. The numbers in
between are identification codes
used for traceability. This
information is used to contact
customers if a tire defect requires
a recall.
Location of the Tire Label
You will find a Tire Label
containing tire inflation pressure
by tire size and other important
information located on the B-Pillar
or the edge of the driver's door.
Inflating the Tires WARNING: Under-inflation
is the most common cause of tire
failures and may result in severe
tire cracking, tread separation or
blowout, with unexpected loss of
vehicle control and increased risk
of injury. Under-inflation increases
sidewall flexing and rolling
resistance, resulting in heat
buildup and internal damage to
the tire. It also may result in
unnecessary tire stress, irregular
wear, loss of vehicle control and
accidents. A tire can lose up to
half of its air pressure and not
appear to be flat!
Safe operation of your vehicle
requires that the tires are correctly
inflated.
Every day before you drive, check
the tires. If one looks lower than
the others, use a tire gauge to
check pressure of all tires and
adjust if required.
At least once a month and before
long trips inspect each tire
including the spare tire. Check the
tire pressure with a tire pressure
gauge. Inflate all tires to the
correct inflation pressure.
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Tire Age
WARNING: Tires degrade
over time depending on many
factors such as weather, storage
conditions, and conditions of use
(load, speed, inflation pressure)
the tires experience throughout
their lives. WARNING:
In general, tires
should be replaced after six years
regardless of tread wear.
However, heat caused by hot
climates or frequent high loading
conditions can accelerate the
aging process and may require
tires to be replaced more
frequently. WARNING:
You should
replace your spare tire when you
replace the road tires or after six
years due to aging even if it has
not been used.
Tire Replacement
Requirements WARNING:
Only use
replacement tires and wheels that
are the same size, load index,
speed rating and type (such as
P-metric versus LT-metric or
all-season versus all-terrain) as
those originally provided by Ford.
The recommended tire and wheel
size may be found on either the
Safety Compliance Certification
Label (affixed to either the door hinge pillar, door-latch post, or the
door edge that meets the
door-latch post, next to the
driver's seating position), or the
Tire Label which is located on the
B-Pillar or edge of the driver's
door. If this information is not
found on these labels, then you
should contact your authorized
dealer as soon as possible. Use of
any tire or wheel not
recommended by Ford can affect
the safety and performance of
your vehicle, which could result in
an increased risk of loss of vehicle
control, vehicle rollover, personal
injury and death.
WARNING:
Always inflate
steel carcass tires with a remote
air fill with the person inflating
standing at a minimum of
12 ft
(3.66 m) away from the wheel
and tire assembly.
Your vehicle is fitted with tires
designed to provide a safe ride
and handling capability.
We recommend that the two front
tires or two rear tires generally be
replaced as a pair.
Note: The wheel valve stems must
also be replaced when the road
tires are replaced on your vehicle.
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Fitting Replacement Tires
WARNING: To reduce the
risk of serious injury, when
mounting replacement tires and
wheels, you should not exceed the
maximum pressure indicated on
the sidewall of the tire to set the
beads without additional
precautions listed below. If the
beads do not seat at the
maximum pressure indicated,
re-lubricate and try again. WARNING:
When inflating
the tire for mounting pressures up
to
20 psi (1.38 bar) greater than
the maximum pressure on the tire
sidewall, the following
precautions must be taken to
protect the person mounting the
tire:
1. Make sure that you have the correct tire and wheel size.
2. Lubricate the tire bead and
wheel bead seat area again.
3. Stand at a minimum of
12 ft
(3.66 m) away from the wheel
and tire assembly.
4. Use both eye and ear
protection. Tire Pressure Monitoring
System
(If Equipped)
The use of wheels or tires not
recommended by Ford Motor
Company may affect the
operation of the tire pressure
monitoring system. If the tire
pressure monitoring system
indicator is flashing, the tire
pressure monitoring system is
malfunctioning. The replacement
tire might be incompatible with
the tire pressure monitoring
system, or a component of the tire
pressure monitoring system may
be damaged. See
Tire Pressure
Monitoring System (page 287).
The tire pressure sensors mounted
in the wheels (originally installed
on your vehicle) are not designed
to be used in aftermarket wheels.
Tire Safety Practices WARNING:
If your vehicle is
stuck in snow, mud or sand, do not
rapidly spin the tires; spinning the
tires can tear the tire and cause
an explosion. A tire can explode in
as little as three to five seconds.
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WARNING: Do not spin the
wheels at over 34 mph (55 km/h).
The tires may fail and injure a
passenger or bystander.
Driving habits have a great deal to
do with your tire mileage and
safety:
• Observe posted speed limits.
• Avoid fast starts, stops and
turns.
• Avoid potholes and objects on
the road.
• Do not run over curbs or hit the
tire against a curb when
parking.
Highway Hazards
No matter how carefully you drive
there is always the possibility that
you may eventually have a flat tire
on the highway. Drive slowly to the
closest safe area out of traffic.
This may further damage the flat
tire, but your safety is more
important.
If you feel a sudden vibration or
ride disturbance while driving, or
you suspect a tire or your vehicle
has been damaged, immediately
reduce your speed. Drive with
caution until you can safely pull
off the road. Stop and inspect the
tires for damage. If a tire is
under-inflated or damaged,
deflate it, remove wheel and replace it with the spare tire and
wheel. If you cannot detect a
cause, have the vehicle towed to
the nearest repair facility or tire
dealer to have the vehicle
inspected.
Tire and Wheel Alignment
A bad jolt from hitting a curb or
pothole can cause the front end
of your vehicle to become
misaligned or cause damage to
the tires. If your vehicle seems to
pull to one side when you are
driving, the wheels may be out of
alignment. Have an authorized
dealer check the wheel alignment
periodically.
Wheel misalignment in the front
or the rear can cause uneven and
rapid treadwear of the tires and
should be corrected by an
authorized dealer. Front-wheel
drive vehicles and those with an
independent rear suspension may
require alignment of all four
wheels.
The tires should also be balanced
periodically. An unbalanced tire
and wheel assembly may result in
irregular tire wear.
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Tire Rotation
WARNING: If the tire label
shows different tire pressures for
the front and rear tires and the
vehicle has a tire pressure
monitoring system, then you need
to update the settings for the
system sensors. Always perform
the system reset procedure after
tire rotation. If you do not reset the
system, it may not provide a low
tire pressure warning when
necessary. See
Tire Pressure
Monitoring System (page 287).
Rotating the tires at the
recommended interval detailed in
the Scheduled Maintenance
chapter will help the tires wear
more evenly, providing better tire
performance and longer tire life.
Sometimes irregular tire wear can
be corrected by rotating the tires.
Note: After rotating the tires the
inflation pressure must be checked
and adjusted to the vehicle
requirements.
Note: If the tires show uneven
wear ask an authorized dealer to
check for and correct any wheel
misalignment, tire imbalance or
mechanical problem involved
before tire rotation. Note:
Your vehicle may have a
dissimilar spare wheel and tire
assembly. A dissimilar spare wheel
and tire assembly is defined as a
spare wheel and tire assembly that
is different in brand, size or
appearance from the road tires and
wheels. If you have a dissimilar
spare wheel and tire assembly it is
intended for temporary use only
and should not be used in a tire
rotation.
Rear-wheel drive and
four-wheel drive vehicles with
single rear wheels (front tires
at left of diagram). 285
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Rear-wheel drive and
four-wheel drive vehicles with
dual rear wheels.
USING WINTER TIRES
WARNING: If you choose to install
snow tires on your vehicle, they must be
the same size, construction, and load range
as the original tires listed on the tire
placard, and they must be installed on all
four wheels. Mixing tires of different size
or construction on your vehicle can
adversely affect your vehicle's handling
and braking, and may lead to loss of
vehicle control. Your vehicle has all-season tires that are
optimized for use in all weather conditions.
As the seasons change you may choose to
use winter tires or snow tires. Winter tires
and snow tires are available to purchase
from an authorized dealer.
We recommend that you use winter tires
when the temperature is
45°F (7°C) or
lower, or in snow and ice conditions.
If you use winter tires or snow tires, inflate
them to the recommended tire pressures
listed on the tire information label. The
label is on the driver side B-pillar.
USING SNOW CHAINS WARNING:
Snow tires must be the
same size, load index and speed rating as
those originally provided by Ford. Use of
any tire or wheel not recommended by
Ford can affect the safety and
performance of your vehicle, which could
result in an increased risk of loss of control,
vehicle rollover, personal injury and death.
Additionally, the use of non-recommended
tires and wheels can cause steering,
suspension, axle, transfer case or power
transfer unit failure. Follow the Ford
recommended tire inflation pressure found
on the Safety Compliance Certification
Label (on the door hinge pillar, door latch
post or the door edge that meets the door
latch post, next to the driver seat), or Tire
Label on the B-Pillar or the edge of the
driver door. Failure to follow the tire
pressure recommendations can cause
uneven treadwear patterns and adversely
affect the way your vehicle handles.
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