Customer Information; Tread Wear; Uniform Tire Quality Grading System (UTQGS)- Page 228

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Customer Information

Form No. 8Q47-EA-01F

Uniform Tire Quality Grading System (UTQGS)

This information relates to the tire grading system developed by the U.S. National 
Highway Traffic Safety Administration for grading tires by tread wear, traction, and 
temperature performance.

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Tread Wear

The tread wear grade is a comparative rating based on the wear rate of the tire when tested 
under controlled conditions on a specified government test course.
For example, a tire graded 150 would wear one-and-a-half times as well on the government 
course as a tire graded 100.

The relative performance of tires depends upon the actual conditions of their use, however, 
and may depart significantly from the norm because of variations in driving habits, service 
practices and differences in road characteristics and climate.

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Traction-AA, A, B, C

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.

Uniform Tire Quality Grading System (UTQGS)

The traction grade assigned to this tire is based on braking (straight ahead) traction 
tests and does not include acceleration cornering (turning), hydroplaning, or peak 
traction characteristics.

WARNING

J76Y.book  Page 12  Wednesday, March 27, 2002  5:04 PM