2009 Cadillac DTS Owners Manual PDF | Page 363

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 in?ation 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 in?ation
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
in?ation pressure to the maximum in?ation pressure
shown on the tire sidewall, or 38 psi (265 kPa),
whichever is lower. See the example following.
Example:
You will ?nd the maximum load and in?ation pressure
molded on the tire?s sidewall, in small letters, near
the rim ?ange. 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 in?ation pressure for
high-speed driving at 38 psi (265 kPa).
When you end this high-speed driving, return the tires
to the cold in?ation pressure shown on the Tire and
Loading Information label. See Loading the Vehicle on
page 4-19.
5-59

Summary of Content

High-Speed Operation{ CAUTION:Driving at high speeds, 100 mph (160 km/h) orhigher, puts an additional strain on tires. Sustainedhigh-speed driving causes excessive heat build upand can cause sudden tire failure. You could havea crash and you or others could be killed. Somehigh-speed rated tires require ination pressureadjustment for high speed operation. When speedlimits and road conditions are such that a vehiclecan be driven at high speeds, make sure the tiresare rated for high speed operation, in excellentcondition, and set to the correct cold tire inationpressure for the vehicle load.If your vehicle has P235/55R17 or P245/50R18 sizetires, and you will be driving at speeds of 100 mph(160 km/h) or higher, where it is legal, set the coldination pressure to the maximum ination pressureshown on the tire sidewall, or 38 psi (265 kPa),whichever is lower. See the example following.Example:You will nd the maximum load and ination pressuremolded on the tires sidewall, in small letters, nearthe rim ange. It will read something like this: Maximumload 690 kg (1521 lbs) 300 kPa (44 psi) Max. Press.For this example, you would set the ination pressure forhigh-speed driving at 38 psi (265 kPa).When you end this high-speed driving, return the tiresto the cold ination pressure shown on the Tire andLoading Information label. See Loading the Vehicle onpage 4-19.5-59