Volvo 2006 XC70, Owner'S Manual

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Wheels and tires
Tire age
Tires degrade over time,
even when they are not
being used, which can
affect their reliability and
roadholding characteristics.
Therefore, all tires older than 6 years
(including the spare tire and winter tires)
should be inspected by a qualified technician,
regardless of appearance or mileage. Heat
caused by hot climates or frequent high
loading conditions can accelerate the aging
process.
A tire's age can be determined by the DOT
stamp on the sidewall (see the illustration
above).
A tire with e.g., visible cracks or discoloration
should be replaced immediately.
Improving tire economy:
•
Maintain correct tire pressure. See the tire
pressure table on page 122.
•
Drive smoothly: avoid fast starts, hard
braking and tire screeching.
•
Tire wear increases with speed.
•
Correct front wheel alignment is very
important.
•
Unbalanced wheels impair tire economy
and driving comfort.
•
Tires must maintain the same direction of
rotation throughout their lifetime.
•
When replacing tires, the tires with the
most tread should be mounted on the rear
wheels to reduce the chance of oversteer
during hard braking.
Hitting curbs or potholes can damage the
tires and/or wheels permanently.