Ford Expedition (2018 year). Manual — part 86

B. 215: Indicates the nominal
width of the tire in millimeters
from sidewall edge to sidewall
edge. In general, the larger the
number, the wider the tire.

C. 65: Indicates the aspect ratio
which gives the tire's ratio of
height to width.

D. R: Indicates a radial type tire.

E. 15: Indicates the wheel or rim
diameter in inches. If you change
your wheel size, you will have to
purchase new tires to match the
new wheel diameter.

F. 95: Indicates the tire's load
index. It is an index that relates to
how much weight a tire can carry.
You may find this information in
your owner’s manual. If not,
contact a local tire dealer.

Note:

You may not find this

information on all tires because it
is not required by federal law.

G. H: Indicates the tire's speed

rating. The speed rating denotes
the speed at which a tire is
designed to be driven for extended
periods of time under a standard
condition of load and inflation
pressure. The tires on your vehicle
may operate at different
conditions for load and inflation
pressure. These speed ratings may
need to be adjusted for the
difference in conditions. The
ratings range from 81 mph
(130 km/h) to 186 mph
(299 km/h). These ratings are
listed in the following chart.

Note:

You may not find this

information on all tires because it
is not required by federal law.

mph ( km/h)

Letter
rating

81 (130)

M

87 (140)

N

99 (159)

Q

106 (171)

R

112 (180)

S

118 (190)

T

124 (200)

U

130 (210)

H

149 (240)

V

168 (270)

W

186 (299)

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.

H. U.S. DOT Tire Identification
Number:

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.

I. M+S or M/S: Mud and Snow, or

AT:

All Terrain, or

AS:

All Season.

J. Tire Ply Composition and
Material Used:

Indicates the

number of plies or the number of
layers of rubber-coated fabric in
the tire tread and sidewall. Tire
manufacturers also must indicate
the ply materials in the tire and the
sidewall, which include steel,
nylon, polyester, and others.

K. Maximum Load: Indicates the
maximum load in kilograms and
pounds that can be carried by the
tire (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 Tire
Label located on the B-pillar or
the edge of the driver's door.

L. Treadwear, Traction and
Temperature Grades:

*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.

*Traction: 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: 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.

M. Maximum Inflation
Pressure:

Indicates the tire

manufacturers' maximum
permissible pressure or the
pressure at which the maximum
load can be carried by the tire. This
pressure is normally higher than
the vehicle manufacturer's
recommended cold inflation
pressure which can be found on
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 Tire Label located on
the B-pillar or the edge of the
driver's door. The cold inflation
pressure should never be set lower
than the recommended pressure
on the vehicle label.

The tire suppliers may have
additional markings, notes or
warnings such as standard load
or radial tubeless.

Additional Information
Contained on the Tire Sidewall
for LT Type Tires

Note:

Tire Quality Grades do not

apply to this type of tire.

A

B

C

B

D

E142544

LT type tires have some additional
information beyond those of P
type tires. These differences are
described below.

A. LT: Indicates a tire, designated
by the Tire and Rim Association,
that is intended for service on light
trucks.

B. Load Range and Load
Inflation Limits:

Indicates the

tire's load-carrying capabilities
and its inflation limits.

C. Maximum Load Dual lb (kg)
at psi (kPa) cold:

Indicates the

maximum load and tire pressure
when the tire is used as a dual;
defined as four tires on the rear
axle (a total of six or more tires on
the vehicle).

D. Maximum Load Single lb
(kg) at psi (kPa) cold:

Indicates

the maximum load and tire
pressure when the tire is used as
a single; defined as two tires
(total) on the rear axle.

Information on T Type Tires

T145/80D16 is an example of a
tire size.

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.

A

B

C

D

E

E142545

T type tires have some additional
information beyond those of P
type tires. These differences are
described below:

A. T: Indicates a type of tire,
designated by the Tire and Rim
Association, that is intended for
temporary service on cars, sport
utility vehicles, minivans and light
trucks.

B. 145: Indicates the nominal
width of the tire in millimeters
from sidewall edge to sidewall
edge. In general, the larger the
number, the wider the tire.

C. 80: Indicates the aspect ratio
which gives the tire's ratio of
height to width. Numbers of 70 or
lower indicate a short sidewall.

D. D: Indicates a diagonal type tire.

R:

Indicates a radial type tire.

E. 16: Indicates the wheel or rim
diameter in inches. If you change
your wheel size, you will have to
purchase new tires to match the
new wheel diameter.

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.
See Load Carrying (page 254).

Inflating Your Tires

Safe operation of your vehicle
requires that your tires are
properly inflated. Remember that
a tire can lose up to half of its air
pressure without appearing flat.

Every day before you drive, check
your 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 and
check the tire pressure with a tire
gauge (including spare, if
equipped). Inflate all tires to the
inflation pressure recommended
by Ford Motor Company.