112nTire replacement
Traction
Temperature
Uniform Tire Quality Grading
The traction grades, from highest to
lowest, are AA, A, B and C.
Those grades represent the tire's ability tire's resistance to the generation of
The temperature grades are A (the
highest), B and C, representing the
Quality grades can be found where
applicable on the tire sidewall between
tread shoulder and maximum section
width. For example:
to stop on wet pavement as measured
under controlled conditions on speci-
fied government test surfaces of
heat and its ability to dissipate heat
when tested under controlled condi-
tions on a specified indoor laboratory
test wheel.
Tread wear 200
Traction AA
Temperature A
asphalt and concrete. A tire marked C
may have poor traction performance.
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
Do not use retreaded tires as this
could negatively affect driving
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 charac-
teristics.<
safety. This is due to the possible varia-
tions in casing structures and, in some
cases, to their extreme age, factors
which can lead to a decrease in their
durability.<
passenger vehicle 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.
The temperature grade for this tire
is established for a tire that is
properly inflated and not overloaded.
Excessive speed, under-inflation, or
excessive loading, either separately or
in combination, can cause heat buildup
and possible tire failure.<
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