Tire Pressure for High-Speed Operation

Cadillac SRX / Cadillac SRX Owners Manual / Vehicle Care / Wheels and Tires / 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 P235/65R18, P235/55R20, or 235/55R20 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 260 kPa (38 psi), whichever is lower. Return the tires to the recommended cold tire inflation pressure when high-speed driving has ended. See Vehicle Load Limits and Tire Pressure.

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.

    See also:

    Navigation Symbols
    The following symbols are the most common symbols that appear on a map screen. The vehicle is shown as this symbol. It indicates the current position and the direction the vehicle is traveling on ...

    Storing a Favorite Station
    A maximum of 36 stations can be programmed as favorites using the six softkeys below the radio station frequency tabs on the display and by using the radio favorites page button (FAV button) ...

    MRC, electric power steering and other advanced control systems
    Supporting the ATS's new suspension designs are advanced damping, steering and braking systems, including Magnetic Ride Control. Magnetic Ride Control (MRC) is the heart of the FE3 Sport Suspensio ...