Kia EV9 2023 Owner's Manual page 623

Maintenance
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Tire speed ratings
The chart below lists many of the different speed ratings currently being used for passen-
ger car tires. The speed rating is part of the tire size designation on the sidewall of the tire.
This symbol corresponds to that tire's designed maximum safe operating speed.
Speed Rating Symbol
3. Checking tire life (TIN: Tire Identification Number)
Any tires that are over 6 years old, based on the manufacturing date, should be replaced
by new ones. You can find the manufacturing date on the tire sidewall, displaying the DOT
Code. The manufacturing date is designated by the last four digits (characters) of the DOT
code.
DOT: XXXX XXXX OOOO
The front part of the DOT means a plant code number, tire size and tread pattern and the
last four numbers indicate week and year manufactured.
For example, DOT XXXX XXXX 1623 represents that the tire was produced in the 16th
week of 2023.
WARNING
Tires degrade over time, even when they are not being used. Regardless of the remaining
tread, we recommend that tires be replaced after approximately 6 years of normal service.
Heat caused by hot climates or frequent high loading conditions can accelerate the aging
process. Failure to follow this warning can result in sudden tire failure, which could lead to
a loss of control and an accident involving serious injury or death.
4. Tire ply composition and material
The number of layers or plies of rubber-coated fabric in the tire. Tire manufacturers also
must indicate the materials in the tire, which include steel, nylon, polyester, and others.
The letter "R" means radial ply construction; the letter "D" means diagonal or bias ply con-
struction; and the letter "B" means belted-bias ply construction.
Rim width in inches.
Rim contour designation.
Rim diameter in inches.
S
T
H
V
W
Y
8.0J X 20
180 km/h (112 mph)
190 km/h (118 mph)
210 km/h (130 mph)
240 km/h (149 mph)
270 km/h (168 mph)
300 km/h (186 mph)
Replacing components
Maximum Speed
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