2005 Cadillac CTS Owner's Manual - Page 344

High Speed Operation (CTS-V) Use the following chart to determine the cold tire inflation pressure when operating your vehicle under these conditions. Tire Size: 245/45R18 96W Recommended Cold Tire Inflation Pressure for High Speed Operation at 130 mph (209 km/h) or more: Occupant and Cargo Weight: Less than 600 lbs (272 kg) Occupant and Cargo Weight: 600 lbs (272 kg) Up to 882 lbs (400 kg) (Vehicle Capacity Weight) Front Tires 32 psi (220 kPa) Rear Tires 34 psi (235 kPa) {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 performance series has 245/45R18 96W size tires. These high-performance tires require inflation pressure adjustment when driving your vehicle at speeds of 130 mph (209 km/h) or higher with occupants and cargo weighing 600 lbs. (272 kg) up to 882 lbs. (400 kg). Front Tires 30 psi (210 kPa) Rear Tires 30 psi (210 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 Your Vehicle on page 4-33. 5-64