Uniform Tire Quality Grading System (Utqgs); Tread Wear; Traction — Aa, A, B, C; Temperature — A, B, C - Mazda 626 Owner's Manual

Customer Information
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.
I 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.
9-12
Form No. 8P95-EA-00G
n091-1AE
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.
I 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.
! WARNING
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.
I 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.