tire damage.
Wear indicator 
The tires have a  so-called "wear indicator" in the form  of a  number of narrow strips running across or parallel to the
tread. When approx. 1/16" (1.6 mm) is left on the tread, these strips become visible and  indicate that the tire should be
replaced.  
Tires with less than 1/16" (1.6 mm) tread have a  very poor grip in rain or snow. 
When replacing worn tires, it is recommended that the tire be  identical  in type (radial)  and  size as the one  being
replaced.  Using a  tire of the same make (manufacturer) will prevent alteration of the driving characteristics of the
vehicle.
To improve tire economy:
 Maintain correct tire pressure. See  the tire pressure label  on the inside of the fuel filler  door.
 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.
 If the wheels are rotated, they should be  kept on the same side of the car so that they revolve in the same direction
as prior  to rotation.
 Hitting curbs or potholes can damage the tires and/or wheels permanently.
Flat spots  
All tires become warm during use. After cooling, when the vehicle is parked, the tires have a  tendency to distort
slightly,  forming flat spots. These flat spots can cause vibrations similar to the vibrations caused by unbalanced wheels.
They do, however,  disappear when the tire warms up. The degree to which  flat spots form  depends on the type of cord
used in the tire. Remember that, in cold weather, it takes longer for the tire to warm up and  consequently longer for the
flat spot to disappear.
pg. 81 Wheels and tires
Snow chains  
Snow chains can be  used on your Volvo with the following restrictions:
 Snow chains should be  installed on front  wheels only. Use only Volvo approved snow chains.
 Snow chains may only be  mounted on approved snow tires 185/65 R15. Consult your Volvo retailer. 
If accessory,  aftermarket or "custom" tires and  wheels are installed and  are of a  size different  than the original tires
and  wheels, chains in some cases CANNOT be  used. Sufficient  clearances between chains and  brakes, suspension and
body components must  be  maintained.
 Some strap  on type chains will interfere  with brake components and  therefore CANNOT be  used. 
Consult your Volvo retailer for additional snow chain information.
CAUTION:
 Check local  regulations  regarding the use of snow chains before installing.
 Always follow the chain manufacturer's installation  instructions carefully. Install chains as tightly as possible and
retighten periodically.
 Never  exceed the chain manufacturer's specified maximum speed limit. (Under no circumstances should that limit
be  higher than 30 mph (45 km/h).
 Avoid bumps, holes or sharp turns when driving with snow chains.
 The handling of the vehicle can be  adversely affected when driving with chains. Avoid fast  or sharp turns as well as
locked wheel braking.
ProCarManuals.com 
Snow tires, studded tires *
Tires for winter use: 
Owners who live in or  regularly  commute  through  areas with sustained  periods of snow or  icy driving
conditions are strongly advised to fit  suitable winter tires to help retain the highest degree of traction. 
It is important to install  winter tires on all four wheels  to help retain traction during cornering, braking, and
accelerating. Failure to do so could reduce traction to an  unsafe level  or adversely affect handling. Do not mix tires of
different  design as this  could also negatively affect overall tire road grip. Volvo recommends  185/65 R15 winter tires
on 15" steel rims  on all S/V 40 models.
Winter tires wear  more quickly on dry roads in warm weather. They should be  removed when the winter driving
season has ended.
Studded tires  should be  run-in 300-600 miles (50-1000 km) during which  the car should be  driven as smoothly as
possible to give the studs the opportunity to seat properly in the tires. The car tires should have the same rotational
direction throughout their entire lifetime. In other words,  if you wish to rotate the wheels, make sure that the same
wheels are always on the same side of the car.
NOTE:  Please consult state or provincial regulations  restricting the use of studded winter tires before installing such
tires.
* Where permitted.
pg. 82 Wheels and tires
Checking and correcting  tire pressure
 Refer to the tire pressure label  located on the inside of the fuel filler  door. The tire pressures shown on the top line
of the label  will provide best fuel economy. The tire pressures shown on the second line will provide a  softer ride, but
may reduce fuel economy.
 Check the tire pressure when refueling.
 The tire pressure should be  corrected only when the tires are cold.
 With warm tires, correct only when the pressure is too low. The tire temperature rises after driving just  a  few miles.
Vehicle loading  
The tires on your Volvo will perform to specifications at all normal loads when inflated as recommended on the tire
information label  located on the inside of the fuel filler  door*. This label  also lists vehicle load limits. Do not load
your car beyond  the indicated limits.
*Please note that the tire information label  indicates pressure for both comfort and  fuel economy.
Tire pressure  label on fuel filler  door
ProCarManuals.com