Thor Motor Coach CLASS A - Tire Identification Information

TIRES AND WHEELS
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5
CUSTOMER CARE | 877.855.2867
Tire Identification Information
To maintain the load capacity of this motorhome, it is
vitally important to replace worn or damaged tires with
tires with ratings equal to or higher than what was originally
equipped on this vehicle. e illustration below describes
important tire information that is embossed on every tire
by the manufacturer.
e Load Index may be indicated with two numbers separated
with a forward slash. e rst number is the load index of the
tire congured as a single tire on a single wheel. e second
number indicates the load index of the tire as a dual-wheel
conguration. Multiplying the second number by 2 will give
the total Load Index for a dual wheel conguration.
NOTE: The load index per tire configured as dual wheel
is less than a single tire to provide a margin of safety for
the load-carrying capacity of the tire in the event that one
of the dual tires is punctured or otherwise fails.
T
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N
A
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P
2
1
5
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6
5
R
1
5
8
9
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M
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S
M
A
N
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F
A
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R
T
R
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A
D
W
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A
R
2
2
0
T
R
A
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T
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A
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M
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R
A
T
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5
P
S
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A
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A
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S
D
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1
2
0
2
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0
6
T
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2
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+
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S
RIM DIAMETER CODE: This two-digit
number is the wheel or rim diameter
in inches.
LOAD INDEX: This two- or three-digit
number is the tire’s load index. It is an
indicator of how much weight each
tire can support. Note: you may not
nd this information on all tires
because it is not required by law.
R: The “R” stands for radial. Radial tires have been
the industry standard for the past 20 years.
P or LT: The “P” indicates the tire is for
passenger vehicles. “LT” indicates the
tire is for light trucks.
NOMINAL WIDTH: This three-digit
number gives the width of the tire
in millimeters from sidewall edge
to sidewall edge. The larger the
number, the wider the tire.
MAXIMUM LOAD RATING:
This
number indicates the maximum
load the tire can carry.
MAXIMUM PERMISSIBLE
INFLATION PRESSURE: This
number is the greatest amount of
air pressure that should ever be put
in the tire. This is NOT the same as the
vehicle manufacturer’s recommended
tire pressure.
TEMPERATURE: The temperature rating
indicates how well the tire resists heat.
ASPECT RATIO: This two-digit number gives
the tire’s ratio of height to width. A number of
50 or lower indicates a short sidewall for improved
steering response and better overall handling.
TRACTION: The t
raction rating indicates the tire’s
ability to allow a car to stop on wet pavement in a
shorter distance.
TREADWEAR: The treadwear rating indicates how long the
tire should last. The higher the number, the longer it should
take for the tires to wear down.
SPEED RATING: The speed
rating tells you the maximum
speed capability of a tire. The
speed ratings include speeds
from 99 mph to above 186 mph.
Note. you man not nd this
information on all tires because
it is not required by law.
M+S: This indicates that the tire
has some mud and snow capability
.
U.S. DOT TIRE IDENTIFICATION NUMBER:
This number begins with the letters ‘DOT’ and indicates
that the tire meets all Federal standards. The next two or
three numbers or letters are the plant code where the tire
was manufactured. The last four numbers represent the
week and year the tire was built. For example, the numbers
3107 means the 31st week of the year 2007. The other
numbers are marketing codes used at the namufacturer’s
discretion. This information is for contacting consumers if a
tire defect requires a recall.
MANUFACTURER:
The name of
the tire manufacturer.
Illustration courtesy of NHTSA, www.safercar.gov