Customer Information; Uniform Tire Quality Grading System (UTQGS); Temperature-A, B, C- Page 229

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Customer Information

Uniform Tire Quality Grading System (UTQGS)

Form No. 8Q47-EA-01F

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Temperature-A, B, C

The temperature grades are A (the highest), B, and C, represent 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 temperatures can lead to sudden tire failure.

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.

These grades will be added to the sidewalls of passenger vehicle tires over the next several 
years according to a schedule established by the NHTSA and the tire manufacturers.

The grade of tires available as standard or optional equipment on Mazda vehicle may vary 
with respect to grade.

ALL PASSENGER VEHICLE TIRES MUST CONFORM TO THESE GRADES AND 
TO ALL OTHER FEDERAL TIRE-SAFETY REQUIREMENTS.

The temperature grade for 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.

WARNING

J76Y.book  Page 13  Wednesday, March 27, 2002  5:04 PM