Maintenance
527
2. Tyre size designation
A tyre’s sidewall is marked with a tyre
size designation. You will need this
information when selecting replace-
ment tyres for your car. The following
explains what the letters and num-
bers in the tyre size designation
mean.
Example tyre size designation:
(These numbers are provided as an
example only; your tyre size designa-
tor could vary depending on your
vehicle.)
P205/65R15 92H
P - Applicable vehicle type (tyres
marked with the prefix “P’’ are
intended for use on passenger
cars or light trucks; however, not
all tyres have this marking).
205 - Tyre width in millimeters.
65 - Aspect ratio. The tyre’s section
height as a percentage of its
width.
R - Tyre construction code (Radial).
15 - Rim diameter in inches.
92 - Load Index, a numerical code
associated with the maximum
load the tyre can carry.
H - Speed Rating Symbol. See the
speed rating chart in this section
for additional information.
Wheel size designation
Wheels are also marked with impor-
tant information that you need if you
ever have to replace one. The follow-
ing explains what the letters and
numbers in the wheel size designa-
tion mean.
Example wheel size designation:
6.0JX15
6.0 - Rim width in inches.
J - Rim contour designation.
15 - Rim diameter in inches.
Tyre speed ratings
The chart below lists many of the dif-
ferent speed ratings currently being
used for passenger cars. The speed
rating is part of the tyre size desig-
nation on the sidewall of the tyre.
This symbol corresponds to that
tyre's designed maximum safe oper-
ating speed.
S 180 km/h (112 mph)
T 190 km/h (118 mph)
H 210 km/h (130 mph)
V 240 km/h (149 mph)
Z Above 240 km/h (149 mph)
W*
270 km/h (168 mph)
Maximum Speed
Speed
Rating
Symbol
* W speed rating is sub-category of the Z
speed rating.
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