Tire Pressure for High-Speed Operation
WARNING!
Driving at high speeds, 160 km/h
(100 mph) or higher, puts an
additional strain on tires.
Sustained high-speed driving
causes excessive heat buildup
and can cause sudden tire failure.
You could have a crash and you
or others could be killed. Some
high-speed rated tires require
inflation pressure adjustment for
high-speed operation. When
speed limits and road conditions
are such that a vehicle can be
driven at high speeds, make sure
the tires are rated for high-speed
operation, in excellent condition,
and set to the correct cold tire
inflation pressure for the
vehicle load.
Vehicles with 255/40ZR19 or 285/35ZR19 size tires require inflation pressure adjustment when driving the vehicle at speeds of 160 km/h (100 mph) or higher.
Set the cold inflation pressure to the maximum inflation pressure shown on the tire sidewall, or 300 kPa (44 psi), whichever is lower.
See the example following. Return the tires to the recommended cold tire inflation pressure when high-speed driving has ended. See Vehicle Load Limits and Tire Pressure.
Example:
The maximum load and inflation pressure is molded on the tire sidewall, in small letters, near the rim flange. It will read something like this: Maximum load 690 kg (1521 lbs) 300 kPa (44 psi) Max.
Press.
For this example, set the inflation pressure for high–speed driving at 300 kPa (44 psi).
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