僅 Tire Terminology And Definitions - Kia Stinger 2023 Owner's Manual

Maintenance
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-ahalf 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 sig-
nificantly from the norm due to varia-
tions in driving habits, service practices
and differences in road characteristics
and climate.
Tires degrade over time, even when they
are not being used. Regardless of the
remaining tread, we recommend that
tires be replaced after approximately six
(6) years of normal service. Heat caused
by hot climates or frequent high loading
conditions can accelerate the aging pro-
cess.
These grades are molded on the side-
walls of passenger vehicle tires. The tires
available as standard or optional equip-
ment on your vehicles may vary with
respect to grade.
Traction - AA, A, B & C
The traction grades, from highest to low-
est, are AA, A, B and C. Those grades
represent the tires ability to stop on wet
pavement as measured under controlled
conditions on specified government test
7 40
surfaces of asphalt and concrete. A tire
marked C may have poor traction per-
formance.
The traction grade assigned to this tire is
based on straight-ahead braking trac-
tion tests, and does not include accelera-
tion, cornering, hydroplaning, or peak
traction characteristics.
Temperature -A, B & C
The temperature grades are A (the high-
est), 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 speci-
fied indoor laboratory test wheel.
Sustained high temperature can cause
the material of the tire to degenerate
and reduce tire life, and excessive tem-
perature can lead to sudden tire failure.
The grade C corresponds to a level of
performance which all passenger car
tires must meet under the Federal Motor
Vehicle Safety Standard No. 109. Grades
B and A represent higher levels of per-
formance on the laboratory test wheel
than the minimum required by law.
Tire terminology and definitions
Air Pressure: The amount of air inside
the tire pressing outward on the tire. Air
pressure is expressed in kilopascal (kPa)
or pounds per square inch (psi).
Accessory Weight: This means the
combined weight of optional accesso-
ries. Some examples of optional acces-
sories are, automatic transmission,
power seats, and air conditioning.
Aspect Ratio: The relationship of a tire's
height to its width.
Belt: A rubber coated layer of cords that
is located between the plies and the
tread. Cords may be made from steel or
other reinforcing materials.
Tires and wheels