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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 P235/55R17 or P245/50R18
size tires, and you will be driving at speeds of
100 mph (160 km/h) or higher, where it is legal,
set the cold inflation pressure to the maximum
inflation pressure shown on the tire sidewall, or
38 psi (265 kPa), whichever is lower. See the
example following.
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 (265 kPa).
When you end this high-speed driving, return the
tires to the cold inflation pressure shown on
the Tire and Loading Information label. See
Loading Your Vehicle on page 327.
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