Volvo S80 Owner's Manual page 339

which side of the car they were mounted on,
for example L for left and R for right.
Wear and maintenance
The correct tyre pressure results in more even
wear, see page 344. 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. Volvo rec-
ommends that you contact an authorised
Volvo workshop for checking if you are uncer-
tain about tread depth. If significant differen-
ces in wear (>1 mm difference in tread depth)
between tyres have already occurred, the
least worn tyres must always be placed on
the rear. Understeer is normally easier to cor-
rect than oversteer, and leads to the car con-
tinuing forwards in a straight line rather than
having the rear end skidding to one side,
resulting in possible complete loss of control
over the car. This is why it is important for the
rear wheels never to lose grip before the front
wheels.
Wheels should be stored lying down or hang-
ing up - and not standing up.
WARNING
A damaged tyre can lead to loss of control
of the car.
Tyres with tread wear indicators
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.
08 Wheels and tyres
Rims and wheel bolts
IMPORTANT
The wheel bolts must be tightened to
140 Nm. Overtightening can damage the
nuts and the bolts.
Only use rims that are tested and approved
by Volvo and which are Volvo genuine acces-
sories. Check the torque with a torque
wrench.
Locking wheel bolts*
Locking wheel bolts* can be used on both
aluminium and steel rims. Under the cargo
area floor there is space for the sleeve for the
lockable wheel bolts.
*
Option/accessory, for more information, see Introduction.
General
08
337