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Dot tire quality grading (u.s. vehicles) – HONDA 2000 Insight - Owner's Manual User Manual

Page 239

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DOT Tire Quality Grading (U.S. Vehicles)

The tires on your car meet all U.S.

Federal Safety Requirements. All

tires are also graded for treadwear,

traction, and temperature perform-

ance according to Department of

Transportation (DOT) standards.

The following explains these

gradings.

Uniform Tire Quality Grading

Quality grades can be found where

applicable on the tire sidewall

between the tread shoulder and the

maximum section width. For

example:

Treadwear 200

Traction AA

Temperature A

Treadwear

The treadwear grade is a compara-

tive 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 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.

Traction

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.

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