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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 tires that came on your vehicle
have a number of markings. Those
you should be aware of are described
below.
Whenever tires are replaced, they
should be replaced with tires of the
same size. Following is an example
of tire size with an explanation of
what each component means.
Speed symbol (an
alphabetical code indicating
the maximum speed rating).
Tire construction code (R
indicates radial).
Load index (a numerical code
associated with the maximum
load the tire can carry).
Rim diameter in inches.
Aspect ratio (the tire’s section
height as a percentage of its
width).
Tire width in millimeters.
Vehicletype(Pindicates
passenger vehicle).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 Federal
Motor Vehicle Safety Standard No.
109. Grades B and A represent
higher levels of performance on the
laboratory test wheel than the
minimum required by law.
P
16
R
235
70
104
S
Temperature A,B,C
Tire Labeling
DOT Tire Quality Grading (U.S. Vehicles), Tire Labeling
Tire Size
Technical Information
291
P235/70R16 104S
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