Kia Optima 2017, Owner'S Manual, Page: 660 / 776

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 condi‐
tions on a specified 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.
Grades B and A represent higher levels
of performance on the laboratory test
wheel than the minimum required by
law.
WARNING
The traction grade assigned to this
tire is based on straight ahead brak‐
ing traction tests, and does not in‐
clude acceleration, cornering, hydro‐
planing, or peak traction characteris‐
tics.
WARNING
n
Tire temperature
The temperature grade for this tire
is established for a tire that is prop‐
erly inflated and not overloaded. Ex‐
cessive speed, underinflation, or ex‐
cessive loading, either separately or
in combination, can cause heat build-
up and possible sudden tire failure.
This can cause loss of vehicle control
and serious injury or death.
Low aspect ratio tire (if
equipped)
Low aspect ratio tires, whose aspect
ratio is lower than 50, are provided for
sporty looks.
Because the low aspect ratio tires are
optimized for handling and braking, it
may be more uncomfortable to ride in
and there is more noise compare with
normal tires.
CAUTION
Because the sidewall of the low as‐
pect ratio tire is shorter than the
normal, the wheel and tire of the
low aspect ratio tire is easier to be
damaged. So, follow the instructions
below.
• When driving on a rough road or
off road, drive cautiously because
tires and wheels may be damaged.
And after driving, inspect tires and
wheels.
• When passing over a pothole,
speed bump, manhole, or curb
stone, drive slowly so that the
tires and wheels are not damaged.
• If the tire is impacted, we recom‐
mend that you inspect the tire
condition or contact an authorized
Kia dealer.
• To prevent damage to the tire, in‐
spect the tire condition and pres‐
sure every 3,000 km.
(Continued)
Maintenance
8-74