Acura 2013 RDX - Manual (Page 306)

305
uu Checking and Maintaining Tires u DOT Tire Quality Grading (U.S. Vehicles)
Main
tenan
ce
■ Traction
■
Temperature
1 Traction
1 Temperature
2013 RDX
QRG
Index
TOC
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
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 care 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.
's
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.
Warning: The temperature grade for this tire is
established for a tire that is propertly inflated
and not overloaded. Escessive speed,
underinflation, or excessive loading, either
separately or in combination, can cause
heat buildup and possible tire failure.