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570
Operation
Tires and wheels
For additional information on tire load
rating, see “Load identification”
(
୴ page 571).
Tire speed rating
The tire speed rating 6 (
୴ page 568)
indicates the approved maximum speed
for the tire.
Summer tires
ț At the tire manufacturer’s option, any
tire with a speed capability above
149 mph (240 km/h) can include a
“ZR” in the size designation (for exam-
ple: 245/40 ZR18). To determine the
maximum speed capability of the tire,
the service description for the tire must
be referred to. The service description
is comprised of the tire load rating 5
(
୴ page 568) and the tire speed
rating 6 (
୴ page 568).
If your tire includes “ZR” in the size
designation and no service
description 5 and 6 (
୴ page 568) is
given, the tire manufacturer must be
consulted for the maximum speed ca-
pability.
If a service description 5 and 6
(
୴ page 568) is given, the speed capa-
bility is limited by the speed symbol in
the service description.
Example: 245/40 ZR18 97Y.
In this example, “97Y” is the service
description. The letter “Y” designates
the speed rating and the speed capabil-
ity of the tire is limited to 186 mph
(300 km/h).
i
Tire load rating 5 (୴ page 568) and tire
speed rating 6 (
୴ page 568) are also referred
to as “service description”.
Warning! G
Even when permitted by law, never operate
a vehicle at speeds greater than the
maximum speed rating of the tires.
Exceeding the maximum speed for which
tires are rated can lead to sudden tire
failure, causing loss of vehicle control and
possibly resulting in an accident and/or
personal injury and possible death, for you
and for others.
i
Tire load rating 5 (୴ page 568) and tire
speed rating 6 (
୴ page 568) are also referred
to as “service description”.
Index Speed rating
Q up to 100 mph (160 km/h)
R up to 106 mph (170 km/h)
S up to 112 mph (180 km/h)
T up to 118 mph (190 km/h)
H up to 130 mph (210 km/h)
V up to 149 mph (240 km/h)
W up to 168 mph (270 km/h)
Y up to 186 mph (300 km/h)
(Y) above 186 mph (300 km/h)
ZR above 149 mph (240 km/h)