Buick Regal: Tire Pressure for High-Speed Operation - Electrical System - Vehicle Care - Buick Regal Owners ManualBuick Regal: Tire Pressure for High-Speed Operation

Driving at high speeds, 160 km/h (100 mph) or higher, puts an additional strain on tires. 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 P235/50R18 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 270 kPa (39 psi).

Vehicles with P245/40R19 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 310 kPa (45 psi).

Return the tires to the recommended cold tire inflation pressure when high-speed driving has ended. See Vehicle Load Limits  and Tire Pressure .

    Tire Pressure
    Tires need the correct amount of air pressure to operate effectively. Notice: Neither tire underinflation nor overinflation is good. Underinflated tires, or tires that do not have enough air, can re ...

    Tire Pressure Monitor System
    The Tire Pressure Monitor System (TPMS) uses radio and sensor technology to check tire pressure levels. The TPMS sensors monitor the air pressure in your tires and transmit tire pressure readings to a ...

    See also:

    Using a flat-bed truck
    This is the best way to transport your vehicle. Use the following procedures to ensure safe transportation. 1. Shift the select lever into the “P” position for AT and CVT models or the shif ...

    Materials Added To Engine Oils
    Do not add any supplemental materials, other than leak detection dyes, to your engine oil. Engine oil is an engineered product and it’s performance may be impaired by supplemental additives. ...

    Clock
    Clock and setting control 1 - Display 2 - Control for setting the clock Turn the control clockwise/counterclockwise to set the time. The set time is shown in the information display. The clock ...