Saturn 2008 Astra Automobile User Manual


 
Remove the valve cap from the
tire valve stem. Press the
tire gage firmly onto the valve to
get a pressure measurement.
If the cold tire inflation pressure
matches the recommended
pressure on the Tire and
Loading Information label, no
further adjustment is necessary.
If the inflation pressure is low,
add air until you reach the
recommended amount.
If you overfill the tire, release air
by pushing on the metal stem
in the center of the tire valve.
Re-check the tire pressure with
the tire gage.
Be sure to put the valve caps
back on the valve stems.
They help prevent leaks by
keeping out dirt and moisture.
High-Speed Operation
{ 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.
If the vehicle has P205/55R16 size
tires, additional air pressure is
required when driving the vehicle at
speeds of 99 mph (158 km/h) or
higher. Set the cold tire inflation
pressure to the maximum inflation
pressure shown on the tire sidewall,
or 32 psi (220 kPa), whichever is
lower. See the example following.
Example:
The maximum load and inflation
pressure is molded on the tire’s
sidewall, in small letters, near the
rim flange. It reads something
like this: Maximum load 710 kg
(1565 lbs) 350 kPa (51 psi) Max.
Press.
For this example, the cold tire
inflation pressure for high-speed
driving should be set at 32 psi
(220 kPa).
Vehicle Service and Care 9-47