Z over 149 mph (240 km/h)
W up to 168 mph (270 km/h)
Y up to 186 mph (300 km/h)
Some tire manufacturers label tires with a maximum permissible road speed above 149 mph
(240 km/h) with the letter combination “ZR.”
WARNING
Using incorrect or unmatched tires and/or wheels or improper tire and wheel combinations
can lead to loss of control, collision and serious personal injury.
x Always use tires, wheels and wheel bolts that meet the specifications of the original
factory-installed tires or other combinations that have been specifically approved by the
vehicle manufacturer.
x All 4 wheels must be fitted with radial tires of the same type, the same size (tread
circumference), and the same tread pattern. Driving with different tires reduces vehicle
handling and can lead to a loss of control.
x Never drive faster than the maximum speed for which the tires installed on your vehicle
are rated because tires that are driven faster than their rated speed can fail suddenly.
x Overloading tires can cause heat build-up, sudden tire failure, including a blowout and
sudden deflation and loss of control.
x Temperature grades apply to tires that are properly inflated and not over- or underinflated.
Applicable only in Korea
Tire efficiency label
Fig. 186 Fuel efficiency labels.