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Table of Contents > 8. Technical Information > DOT Tire Quality Grading (U.S. Vehicles)

2010 Honda CR-V Owner's Manual ➜ DOT Tire Quality Grading (U.S. Vehicles)

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DOT Tire Quality Grading (U.S. Vehicles)  
The tires on your vehicle meet all  
U.S. Federal Safety Requirements.  
All tires are also graded for  
Treadwear  
Traction  
The treadwear grade is a compara-  
tive rating based on the wear rate of  
The traction grades, from highest to  
lowest, are AA, A, B, and C. Those  
treadwear, traction, and temperature  
performance according to  
the tire when tested under controlled grades represent the tire’s ability to  
conditions on a specified government stop on wet pavement as measured  
test course. For example, a tire  
Department of Transportation  
(DOT) standards. The following  
explains these gradings.  
under controlled conditions on  
specified government test surfaces  
of asphalt and concrete. A tire  
marked C may have poor traction  
performance.  
graded 150 would wear one and one-  
half (1 1/2) times as well on the  
government course as a tire graded  
100. The relative performance of  
tires depends upon the actual condi-  
tions of their use, however, and may  
depart significantly from the norm  
due to variations in driving habits,  
service practices and differences in  
road characteristics and climate.  
Uniform Tire Quality Grading  
Quality grades can be found where  
applicable on the tire sidewall  
between tread shoulder and  
maximum section width. For  
example:  
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.  
Treadwear 200  
Traction AA  
Temperature A  
All passenger car tires must conform  
to Federal Safety Requirements in  
addition to these grades.  
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DOT Tire Quality Grading (U.S. Vehicles)  
Temperature  
Warning: The temperature grade for  
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  
this tire is established for a tire that  
is properly inflated and not  
overloaded. Excessive speed,  
underinflation, or excessive loading,  
either separately or in combination,  
can cause heat buildup and possible  
tire failure.  
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.  
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