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High-Speed Operation
{CAUTION:
Driving at high speeds, 100 mph (160 km/h)
or higher, puts an additional strain on tires.
Sustained high-speed driving causes
excessive heat build up 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.
If your vehicle has P225/60R17 size tires,
they will require inflation pressure adjustment
when driving your vehicle at speeds of
100 mph (160 km/h) or higher. Set the cold
inflation pressure to the maximum inflation
pressure shown on the tire sidewall, or
38 psi (262 kPa), whichever is lower. See the
example following. When you end this high-speed
driving, return the tires to the cold tire inflation
pressure shown on the Tire and Loading
Information label. See Loading Your Vehicle
on page 391 and Inflation - Tire Pressure
on page 469.
Example:
You will find the maximum load and inflation
pressure molded on the tire’s 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, you would set the
inflation pressure for high-speed driving at
38 psi (262 kPa).
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