Volvo S80 Owner's Manual page 246

Wear and maintenance
The correct tyre pressure results in more even
wear, see page 254. Driving style, tyre pres-
sure, climate and road condition affect how
quickly your tyres age and wear. To avoid dif-
ferences in tread depth and to prevent wear
patterns arising, the front and rear wheels can
be switched with each other. A suitable dis-
tance for the first change is approx. 5000 km
and then at 10 000 km intervals. Contact an
authorised Volvo workshop if you are uncertain
about tread depth.
Wheels should be stored lying down or hanging
up - and not standing up.
WARNING
A damaged tyre can lead to loss of control
of the car.
06 Maintenance and specifications
Tyres with tread wear indicators
Tread wear indicators are narrow treadless
bands across the width of the tread. On the
side of the tyre are the letters TWI (Tread Wear
Indicator). When the tyre's tread depth is down
to 1.6 mm, the tread depth will be level in height
with the tread wear indicators. Change to new
tyres as soon as possible. Remember that
tyres with little tread depth provide very poor
grip in rain and snow.
Rims and wheel bolts
IMPORTANT
The wheel bolts must be tightened to
140 Nm. Overtightening can damage the
nuts and the bolts.
Wheels and tyres
Only use rims that are tested and approved by
Volvo and which are Volvo genuine accesso-
ries. Check the torque with a torque wrench.
Locking wheel bolts
Locking wheel bolts can be used on both alu-
minium and steel rims.
Winter tyres
Volvo recommends winter tyres with particular
dimensions. Tyre dimensions are dependent
on engine variant. When driving on winter tyres,
the correct tyres must be fitted to all four
wheels.
NOTE
Ask a Volvo dealer which rim and tyre types
are most suitable.
Studded tyres
Studded winter tyres should be run in gently for
500-1000 km so the studs settle properly into
the tyres. This gives the tyre, and especially the
studs, a longer service life.
NOTE
The legal provisions for the use of studded
tyres vary from country to country.
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