Cadillac 2005 CTS Owner's Manual page 344

High Speed Operation (CTS-V)
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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).
5-64
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)
Front Rear
Tires Tires
30 psi 30 psi
(210 kPa) (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 .
Occupant and
Cargo Weight:
600 lbs (272 kg)
Up to 882 lbs (400 kg)
(Vehicle Capacity
Weight)
Front Rear
Tires Tires
32 psi 34 psi
(220 kPa) (235 kPa)