Maintenance
249
Tires and wheels
僅 H: Speed Rating Symbol. See
the speed rating chart in this
section for additional informa
-
tion.
Wheel size designation
Wheels are also marked with
important information that you
need if you ever have to replace
one. The following explains what
the letters and numbers in the
wheel size designation mean.
Example wheel size designation:
8.0JX20
僅 8.0: Rim width in inches.
僅 J: Rim contour designation.
僅 20: Rim diameter in inches.
Tire speed ratings
The chart below lists many of the
different speed ratings currently
being used for passenger vehicle
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 operat
-
ing speed.
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 manufac
-
turing date on the tire sidewall
(possibly on the inside of the
wheel), displaying the DOT Code.
The DOT Code is a series of
numbers on a tire consisting of
numbers and English letters. The
manufacturing date is desig
-
nated 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 rep
-
resents that the tire was pro
-
duced in the 16th week of 2023.
Tire Age
Replace tires within the recom
-
mended time frame. Failure to
replace tires as recommended
Speed Rat
-
ing Symbol
Maximum Speed
S 112 mph (180 km/h)
T 118 mph (190 km/h)
H 130 mph (210 km/h)
V 149 mph (240 km/h)
Z Above 149 mph (240 km/h)
Speed Rat
-
ing Symbol
Maximum Speed
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