Hyundai Tucson 2023 Owner's Manual page 371

7. 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, and temperature performance
according to Department of
Transportation (DOT) standards.
Uniform tire quality grading
Quality grades can be found where
applicable on the tire sidewall
between tread shoulder and
maximum section width.
For example:
TREADWEAR 200
TRACTION AA
TEMPERATURE A
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 (1½) 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
due to variations in driving habits,
service practices, and differences in
road characteristics and climate.
These grades are molded on the
sidewalls of passenger vehicle tires.
The tires available as standard or
optional equipment on your vehicle
may vary depending on the grade.
Traction - AA, A, B & C
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.
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.
Temperature - A, B & C
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
conditions on a specified indoor
laboratory test wheel.
Sustained high temperature may
cause the material of the tire to
degenerate and reduce tire life,
and excessive temperature may
lead to sudden tire failure. The
grade C corresponds to a level of
performance that all passenger
car tires must meet the Federal
Motor Vehicle Safety Standard
No. 109. Grades A and B represent
higher levels of performance on
the laboratory test wheel than the
minimum required by law.
09
9-23