Maintenance
44
7
Tire speed ratings
The chart below lists many of the dif-
ferent speed ratings currently being
used for passenger 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 oper-ating speed.
3. Checking tire life (TIN : Tire
Identification Number)
Any tires that are over 6 years old,
based on the manufacturing date,(including the spare tire) should be
replaced by new ones. You can find
the manufacturing date on the tire
sidewall (possibly on the inside of the
wheel), displaying the DOT Code.
The DOT Code is a series of num-
bers on a tire consisting of numbers
and English letters. The manufactur-
ing 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 num-
bers indicate week and year manu-
factured.
For example:
DOT XXXX XXXX 1611 represents
that the tire was produced in the 16th
week of 2011.
4. Tire ply composition and material
The number of layers or plies of rub-
ber-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 con-
struction; the letter "D" means diago-
nal or bias ply construction; and theletter "B" means belted-bias ply con-
struction.
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)
Maximum Speed
Speed
Rating
Symbol
WARNING - Tire age
Tires degrade over time, even
when they are not being used.
Regardless of the remaining
tread, it is recommended that
tires generally be replaced after
six (6) years of normal service.
Heat caused by hot climates orfrequent high loading condi-
tions 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 acci-
dent involving serious injury ordeath.
83
Specifications, Consumer information, Reporting safety defects
TIRES AND WHEELS
Front Rear
225/60R17 6.5J×17 230 230
225/55R18 6.5J×18 (33) (33)
420 420
T155/90D16 4.0T×16 (60) (60)
Full size tire
Compact spare tire Wheel lug nut torque
65~79
(9~11 , 88~107)
Item
Tire
size Wheel size Inflation pressure
kPa (psi)
✽✽NOTICE
It is permissible to add 3psi to the standard tire pressure specification if colder temperatures are expected soon. Tires typically
loose 1psi for every 12°F temperature drop. If extreme temperature variations are expected, re-ch eck your tire pressure as nec-
essary to keep them properly inflated.
