Volvo S 90, Owner'S Manual

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WHEELS AND TIRES
454
CAUTION
•
Snow chains should not be used on
wheels larger than 18".
•
Always follow the chain manufacturer's
installation instructions carefully. Install
chains as tightly as possible and
retighten periodically.
•
Check local regulations regarding the use
of snow chains before installing.
•
Use single-sided snow chains only.
•
Never exceed the chain manufacturer's
specified maximum speed limit. (Under
no circumstances should you exceed
31 mph (50 km/h).
•
Avoid bumps, holes or sharp turns when
driving with snow chains.
•
The handling of the vehicle can be
adversely affected when driving with
chains. Avoid fast or sharp turns as well
as locked wheel braking.
Checking tire inflation pressure
Correct tire inflation pressure helps improve driv-
ing stability, save fuel and increase the service
life of the tires.
WARNING
•
Under-inflation is the most common
cause of tire failure and may result in
severe tire cracking, tread separation, or
"blow-out," with unexpected loss of vehi-
cle control and increased risk of injury.
•
Under-inflated tires reduce the load car-
rying capacity of your vehicle.
Cold tires
Inflation pressure should be checked when the
tires are cold.
The tires are considered to be cold when
they have the same temperature as the sur-
rounding (ambient) air.
This temperature is normally reached after the
vehicle has been parked for at least 3 hours.
After driving a distance of approximately 1 mile
(1.6 km), the tires are considered to be hot. If you
have to drive farther than this distance to pump
your tire(s), check and record the tire pressure
first and add the appropriate air pressure when
you get to the pump.
When weather temperature changes occur, tire
inflation pressures also change. A 10-degree
temperature drop causes a corresponding drop
of 1 psi (7 kPa) in inflation pressure. Check your
tire pressures frequently and adjust them to the
proper pressure, which can be found on the vehi-
cle's tire information placard or certification label.
If checking tire pressure when the tire is hot,
never "bleed" or reduce air pressure. The tires
are hot from driving and it is normal for pressures
to increase above recommended cold pressures.
A hot tire at or below recommended cold inflation
pressure could be significantly under-inflated.
Recommended inflation pressures
Tire inflation placard
A tire inflation pressure placard is located on the
driver's side B-pillar (the structural member at the
side of the vehicle, at the rear of the driver's door
opening). This placard indicates the designation