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Traction AA, A, B, C
■
The traction grades, from highest to
lowest, are AA, A, B and C, and they
represent the tire's ability to stop on
wet pavement as measured under con-
trolled conditions on specified govern-
ment test surfaces of asphalt and
concrete.
A tire marked C may have poor traction
performance.
Warning: The traction grade assigned to
this tire is based on braking (straight
ahead) traction tests and does not include
cornering (turning) traction.
Temperature A, B, C
■
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
Glossary of tire terminology
Tire related term
Cold tire inflation pressure
Maximum inflation pressure
Recommended inflation pres-
sure
Accessory weight
when tested under controlled condi-
tions 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.
Grade C corresponds to a level of perfor-
mance 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.
Warning: The temperature grades for this
tire are established for a tire that is prop-
erly inflated and not overloaded.
Excessive speed, underinflation, or exces-
sive loading, either separately or in combi-
nation, can cause heat buildup and
possible tire failure.
Tire pressure when the vehicle has been parked for three
hours or more, or has not been driven more than 1 mile or
1.5 km under that condition
The maximum cold inflated pressure to which a tire may
be inflated, shown on the sidewall of the tire
Cold tire inflation pressure recommended by a manufac-
turer
The combined weight (in excess of those standard items
which may be replaced) of automatic transmission, power
steering, power brakes, power windows, power seats,
radio and heater, to the extent that these items are avail-
able as factory-installed equipment (whether installed or
not)
8-1. Specifications
Meaning
407
8
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