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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. 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.
DOT
Tire
Quality
Grading
(U.S.
Vehicles)
Warning:
The
temperature grade for
this tire is established for a tire that
is
properly inflated and not over-
loaded. Excessive speed, underinfla-
tion, or excessive loading either
separately or
in
combination, can
cause heat build-up and possible tire
failure.
Technical
Information
247
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