Volvo XC90 Owner's Manual page 155

07 Wheels and tyres
General
Summer and winter wheels
The arrow shows the tyre's direction of rotation
When summer and winter wheels are
changed they should be marked with which
side of the car they were mounted on, for ex-
ample L for left and R for right. Tyres with a
tread pattern which are designed to only turn
in one direction have the direction of rotation
07
marked with an arrow. The tyre should al-
ways rotate in the same direction throughout
its lifespan. Tyres should only be switched
between front and rear positions, never be-
tween left and right-hand sides, or vice versa.
If the tyre is mounted incorrectly, the car's
braking characteristics and capacity to force
rain, snow and slush out of the way are ad-
154
versely affected. Tyres with the greatest
tread depth should always be fitted to the
rear of the car (to decrease the risk of skid-
ding.)
Wheels should be stored lying down or hang-
ing up, and not standing up.
Contact an authorised Volvo workshop if you
are uncertain about tread depth.