WHEELS AND TIRES
found on the vehicle's tire information decal or
certification label.
Checking tire pressure
WARNING
Correct inflation pressure helps improve driv-
ing stability, save fuel and increase the serv-
ice life of the tires.
Tire pressure decreases over time, which is
normal. Tire pressure also varies depending on
the ambient temperature. Driving on under-
inflated tires could cause the vehicle to over-
heat and lead to damage. Tire pressure affects
traveling comfort, road noise and driving cha-
racteristics.
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
vehicle control and increased risk of
injury.
•
•
If you check inflation pressure when the tires
are warm, you should never release air. The
tires become warm after driving and it is nor-
mal for warm tires to have an inflation pres-
sure above the recommended pressure for
cold tires. A warm tire with an inflation pres-
sure equal to or under the recommended pres-
sure for cold tires could be significantly under-
inflated.
Under-inflated tires reduce the load
carrying capacity of your vehicle.
Cold tires
Check the pressure in the tires every month.
Use the recommended inflation pressure for
cold tires to help maintain good tire perform-
ance. Under-inflated or over-inflated tires
could cause uneven tread wear.
Related information
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 surrounding (ambient) air. This tempera-
ture is normally reached after the vehicle has
been parked for at least 3 hours.
Adjusting tire pressure (p. 514)
•
•
•
Recommended tire pressure (p. 515)
Tire pressure monitoring system*
(p. 515)
Use an air pressure gauge and check the infla-
tion pressure on all the tires, including the
spare tire4, at least once a month and before
long trips. Volvo recommends buying a relia-
ble air pressure gauge, as the automatic
gauges provided at service stations may be
inaccurate.
Tires (p. 506)
•
After driving for approximately 1.6 km (1 mile),
the tires are considered to be warm. If you
need to drive longer than that to inflate the
tires, check and record the inflation pressure
of the tires first and inflate accordingly when
you arrive at the pump.
When the ambient temperature changes, so
does the inflation pressure. A 10-degree tem-
perature drop causes a corresponding drop in
inflation pressure of 1 psi (7 kPa). Check the
inflation pressure of the tires regularly and
adjust to the correct pressure, which can be
4
Not available in all models.
* Option/accessory. 513
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