Volvo V70R - Manual (Page 154)

153
Wheels and tyres
General
More even wear and mainte-
nance
The correct tyre pressure results in more
even wear, see page 156. To achieve the
best traction and more even wear on the
tyres, the regular switching of the front and
rear tyres with each other is recommended.
The first change should be after 5 000 km
and then at intervals of 10 000 km, this is to
avoid differences in tread depth. Tyres with
the greatest tread depth should always be
fitted to the rear wheels to decrease the risk
of skidding. 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.
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.
Winter tyres
Volvo recommends winter tyres with
particular dimensions. These are stated on
the tyre pressure label, see page 155 for its
location. The tyre dimensions are dependent
on the engine variant. When driving on winter
tyres, these 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 tyre. This gives the tyre, and
especially the studs, a longer lifespan.
NOTE!
The legal provisions for the use of
studded tyres vary from country to country.
Tread depth
Road conditions with ice, slush and low
temperatures place considerably higher
demands on tyres than summer conditions. It
is therefore not recommended to drive on
winter tyres that have a tread depth of less
than four millimetres.
Snow chains
Snow chains may only be used on the front
wheels. This also applies to all-wheel-drive
cars.
Never drive faster than 50 km/h with snow
chains. Avoid driving on bare ground as this
wears out both the snow chains and tyres.
Never use quick-fit snow chains as the space
between the brake disks and the wheels is
too small.
Locking wheel bolts
Locking wheel bolts can be used on both
aluminium and steel rims. If steel rims with
locking wheel bolts are used in combination
with wheel covers then the locking wheel
bolts must be fitted furthest from the air valve.
Otherwise the wheel cover cannot be fitted
on the rim.
WARNING!
A damaged tyre can lead to loss of control
of the car.
IMPORTANT!
Use Volvo genuine snow chains or equiv-
alent chains designed for the car model,
and tyre and rim dimensions. Consult an
authorised Volvo workshop.