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.
The CTS-V high-performance tires, size 245/45R18 96V and P245/45ZR18 96W require inflation pressure adjustment when driving your vehicle at speeds of 100 mph (160 km/h) or higher. Set the cold tire inflation pressure to the maximum inflation pressure shown on the tire sidewall, or 41 psi (282 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 710 kg (1565 lbs) 350 kPa (51 psi) Max. Press.
For this example, you would set the cold inflation pressure for high-speed driving at 41 psi (282 kPa)
When you end high-speed driving, return the tires to the cold inflation pressures shown on the tire and loading information label. See Loading the Vehicle .
The high-performance tires, size P225/55R16, P225/50R17 or P225/50R18 require inflation pressure adjustment when driving your vehicle at speeds of 100 mph (160 km/h) or higher. Set the cold tire inflation pressure to the maximum inflation pressure shown on the tire sidewall, or 38 psi (262 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 710 kg (1565 lbs) 350 kPa (51 psi) Max. Press.
For this example, you would set the cold inflation pressure for high-speed driving at 38 psi (262 kPa)
When you end high-speed driving, return the tires to the cold inflation pressures shown on the tire and loading information label. See Loading the Vehicle .
