HONDA 2012 Civic Hybrid - Manual (Page 259)

uu Checking and Maintaining Tires u DOT Tire Quality Grading (U.S. Vehicles)
258
Main
tenan
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The traction grades, from highest to lowest, are AA, A, B, and C. Those grades
represent the tire's ability to stop on wet pavement as measured under controlled
conditions on specified government test surfaces of asphalt and concrete. A tire
marked C may have poor traction performance.
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.
■ Traction
■
Temperature
1 Traction
Warning: 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 characteristics.
1 Temperature
Warning: The temperature grade for this
tire is established for a tire that is properly
inflated and not overloaded. Excessive
speed, underinflation, or excessing loading,
either separately or in combination, can
cause heat buildup and possible tire failure.
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