RAM CHASSIS CAB 3500 2017, User Manual

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Traction Grades
The Traction grades, from highest to lowest, are AA, A, B, and C. These
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.
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.
Temperature Grades
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 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.
WARNING!
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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