flat tire VOLVO C70 CONVERTIBLE 2010 Owner´s Manual

07 Wheels and tires
Tire inflation
07

175 Inflation labels
G032513
Tire inflation placard on U.S. models
Check tire inflation pressure regularly.
Tables listing the recommended inflation pres-
sure for your vehicle can be found on page
177. A tire inflation pressure placard is also
located on the driver's side B-pillar (the struc-
tural member at the side of the vehicle, at the
rear of the driver's door opening). This placard
indicates the designation of the factory-moun-
ted tires on your vehicle, as well as load limits
and inflation pressure.
G032520
Tire inflation placard on Canadian models
NOTE
The placards shown indicate inflation pres-
sure for the tires installed on the car at the
factory only.
Use a tire gauge to check the tire inflation pres-
sure, including the spare, at least once a month
and before long trips. You are strongly urged
to buy a reliable tire pressure gauge, as auto-
matic service station gauges may be inaccu-
rate.
Use the recommended cold inflation pressure
for optimum tire performance and wear.Under-inflation or over-inflation may cause
uneven treadwear patterns.
WARNING
•Under-inflation is the most common
cause of tire failure and may result in
severe tire cracking, tread separation,
or "blowout," with unexpected loss of
vehicle control and increased risk of
injury.
•Under-inflated tires reduce the load car-
rying capacity of your vehicle.
When weather temperature changes occur, tire
inflation pressures also change. A 10-degree
temperature drop causes a corresponding
drop of 1 psi (7 kPa) in inflation pressure. Check
your tire pressures frequently and adjust them
to the proper pressure, which can be found on
the vehicle's tire information placard or certifi-
cation label.

07 Wheels and tires
Tire inflation
07
176
Checking tire pressure
Cold tiresInflation pressure should be checked when the
tires are cold.
The tires are considered to be cold when
they have the same temperature as the sur-
rounding (ambient) air.
This temperature is normally reached after the
car has been parked for at least 3 hours.
After driving a distance of approximately 1 mile
(1.6 km), the tires are considered to be hot. If
you have to drive farther than this distance to
pump your tire(s), check and record the tire
pressure first and add the appropriate air pres-
sure when you get to the pump.
If checking tire pressure when the tire is hot,
never "bleed" or reduce air pressure. The tires
are hot from driving and it is normal for pres-
sures to increase above recommended cold
pressures. A hot tire at or below recommended
cold inflation pressure could be significantly
under-inflated.
To check inflation pressure:1. Remove the cap from the valve on one tire,
then firmly press the tire gauge onto the
valve.2. Add air to reach the recommended air
pressure
3. Replace the valve cap.
4. Repeat this procedure for each tire, includ-
ing the spare.
5. Visually inspect the tires to make sure there
are no nails or other objects embedded
that could puncture the tire and cause an
air leak.
6. Check the sidewalls to make sure there are
no gouges, cuts, bulges or other irregular-
ities.
NOTE
•If you overfill the tire, release air by
pushing on the metal stem in the center
of the valve. Then recheck the pressure
with your tire gauge.
•Some spare tires require higher inflation
pressure than the other tires. Consult
the tire inflation tables, see page 177,
or see the inflation pressure placard.
Load ratingsThe load ratings in the tables above translate
as follows:
91 = 1365 lbs (615 kg),
93 = 1433 lbs (650 kg),99 = 1709 lbs (755 kg).
Speed ratingsThe speed ratings in the tables translate as fol-
lows:
M = 81 mph (130 km/h),
V = 149 mph (240 km/h),
W = 168 mph (270 km/h).
See also page 179 for an explanation of the
designations on the sidewall of the tire.

07 Wheels and tires
Inflation pressure—U.S. models
07
177 Tire inflation pressure table
The following tire pressures are recommended
by Volvo for your vehicle. Refer to the tire infla-tion placard for information specific to the tires
installed on your vehicle at the factory.
Tire sizeCold tire pressure up to four persons psi (kPa)
FrontRear
235/45R17 94V M+S36 (250)36 (250)
235/40R18 91Y
Extra Load M+S36 (250)36 (250)
Temporary spare tire
T125/85R16 99M61 (420)61 (420)

07 Wheels and tires
Inflation pressure—Canadian models
07
178
Tire inflation pressure table
The following tire pressures are recommended
by Volvo for your vehicle. Refer to the tire infla-tion placard for information specific to the tires
installed on your vehicle at the factory.
Tire sizeCold tire pressures
Up to four persons
psi (kPa)Optional pressure
Up to three persons
A
psi (kPa)
FrontRearFrontRear
235/45 R17 94V M+S36 (250)36 (250)30 (210)30 (210)
235/40 R18 91Y36 (250)36 (250)32 (220)32 (220)
Temporary spare tire
T125/85R16 99M61 (420)61 (420)61 (420)61 (420)
AOptional pressure may not be used for homologation of fuel consumption or emissions.

07 Wheels and tires
Tire designations
07

179 Tire designations
1
2
3
4
5
6
12
11
10
8
79
G026442
Federal law mandates that tire manufacturers
place standardized information on the sidewall
of all tires (see the illustration).
The following information is listed on the tire
sidewall:
The tire designation:
NOTE
Please be aware that the following tire des-
ignation is an example only and that this
particular tire may not be available on your
vehicle.
215: The width of the tire (in millimeters)
from sidewall edge to sidewall edge. The
larger the number, the wider the tire.
65: The ratio of the tire's height to its width.
R: Radial tire.
15: The diameter of the wheel rim (in
inches).
95: The tire's load index. In this example, a
load index of 95 equals a maximum load of
1521 lbs (690 kg).
H: The tire's speed rating, or the maximum
speed at which the tire is designed to be
driven for extended periods of time, carry-
ing a permissible load for the vehicle, and
with correct inflation pressure. For exam-
ple, H indicates a speed rating of 130 mph
(210 km/h).
NOTE
This information may not appear on the tire
because it is not required by law.
M+S or M/
S = Mud and Snow, AT = All Terrain, AS =
All Season
U.S. DOT Tire Identification Number
(TIN): This begins with the letters "DOT"
and indicates that the tire meets all federal
standards. The next two numbers or letters
are the plant code where it was manufac-
tured, the next two are the tire size code
and the last four numbers represent the
week and year the tire was built. For exam-
ple, 2501 means the 25th week of 2001.
The numbers in between are marketing
codes used at the manufacturer's discre-
tion. This information helps a tire manufac-
turer identify a tire for safety recall purpo-
ses.
Tire Ply Composition and Material Used:
Indicates the number of plies indicates or
the number of layers of rubber-coated fab-
ric in the tire tread and sidewall. Tire man-
ufacturers also must indicate the ply mate-
rials in the tire and the sidewall, which
include steel, nylon, polyester, and others.
Maximum Load: Indicates the maximum
load in pounds and kilograms that can be
carried by the tire. Refer to the vehicle's tire
information placard located on the B-Pillar
or the driver's door for the correct tire pres-
sure for your vehicle.

07 Wheels and tires
Tire designations
07
180
Treadwear, Traction, and Temperature
grades: See page 184 for more informa-
tion.
Maximum permissible inflation pres-
sure: The greatest amount of air pressure
that should ever be put in the tire. This limit
is set by the tire manufacturer.
The tire suppliers may have additional mark-
ings, notes or warnings such as standard load,
radial tubeless, etc.

07 Wheels and tires
Glossary of tire terminology
07
181 Terminology
•Tire information placard: A placard
showing the OE (Original Equipment) tire
sizes, recommended inflation pressure,
and the maximum weight the vehicle can
carry.
•Tire Identification Number (TIN): A num-
ber on the sidewall of each tire providing
information about the tire brand and man-
ufacturing plant, tire size and date of man-
ufacturer.
•Inflation pressure: A measure of the
amount of air in a tire.
•Standard load: A class of P-metric or Met-
ric tires designed to carry a maximum load
at 35 psi [37 psi (2.5 bar) for Metric tires].
Increasing the inflation pressure beyond
this pressure will not increase the tires load
carrying capability.
•Extra load: A class of P-metric or Metric
tires designed to carry a heavier maximum
load at 41 psi [43 psi (2.9 bar) for Metric
tires]. Increasing the inflation pressure
beyond this pressure will not increase the
tires load carrying capability.
•kPa: Kilopascal, a metric unit of air pres-
sure.
•PSI: Pounds per square inch, a standard
unit of air pressure.
•B-pillar: The structural member at the side
of the vehicle behind the front door.
•Bead area of the tire: Area of the tire next
to the rim.
•Sidewall of the tire: Area between the
bead area and the tread.
•Tread area of the tire: Area of the perim-
eter of the tire that contacts the road when
mounted on the vehicle.
•Rim: The metal support (wheel) for a tire or
a tire and tube assembly upon which the
tire beads are seated.
•Maximum load rating: a figure indicating
the maximum load in pounds and kilo-
grams that can be carried by the tire. This
rating is established by the tire manufac-
turer.
•Maximum permissible inflation pres-
sure: the greatest amount of air pressure
that should ever be put in the tire. This limit
is set by the tire manufacturer.
•Recommended tire inflation pressure:
inflation pressure, established by Volvo,
which is based on the type of tires that are
mounted on a vehicle at the factory. This
inflation pressure is affected by the number
of occupants in the car, the amount of
cargo, and the speed at which the vehicle
will be driven for a prolonged period. This
information can be found on the tire infla-
tion placard(s) located on the driver's sideB-pillar and in the tire inflation table in this
chapter.
•Cold tires: The tires are considered to be
cold when they have the same temperature
as the surrounding (ambient) air. This tem-
perature is normally reached after the car
has been parked for at least 3 hours.
Properly loading your vehicle will provide maxi-
mum return of vehicle design performance.

07 Wheels and tires
Uniform tire quality gradings
07
184
Uniform tire quality gradings
ALL PASSENGER VEHICLE TIRES MUST
CONFORM TO FEDERAL SAFETY
REQUIREMENTS IN ADDITION TO THESE
GRADES
Quality grades can be found, where appli-
cable, on the tire sidewall between the tread
shoulder and maximum section width. For
example:
Treadwear 200 Traction AA
Temperature A
TREADWEARThe treadwear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specified gov-
ernment test course. For example, a tire gra-
ded 150 would wear one and one half (1 1/2)
times as well on the government course as a
tire graded 100. The relative performance of
tires depends upon the actual conditions of
their use, however, and many depart signifi-
cantly from the norm due to variation in driving
habits, maintenance practices and differences
in road characteristics and climate.
TRACTIONThe traction grades, from highest to lowest, are
AA, A, B, and C, as measured under controlled
conditions on specified government test sur-faces of asphalt and concrete. A tire marked C
may have poor traction performance. The trac-
tion grade assigned to this tire is based on
braking (straight-ahead) traction tests and is
not a measure of cornering (turning) traction.
WARNING
The traction grade assigned to this tire is
based on braking (straight-ahead) traction
tests and is not a measure of cornering
(turning) traction.
TEMPERATUREThe temperature grades are AA (the highest),
A, B, and C, representing the tire's resistance
to the generation of heat and its ability to dis-
sipate heat when tested under controlled con-
ditions on a specified indoor laboratory test
wheel. Sustained high temperature can cause
the material of the tire to degenerate and
reduce tire life, and excessive temperature can
lead to sudden tire failure. The grade C corre-
sponds to a minimum level of performance that
all passenger vehicle tires must meet under the
Federal Motor Safety Standard No. 109.
Grades B and A represent higher levels of per-
formance on the laboratory test wheel than the
minimum required by law.
WARNING
The temperature grade for this tire is estab-
lished for a tire that is properly inflated and
not overloaded. Excessive speed, under-
inflation, or excessive loading, either sepa-
rately or in combination, can cause heat
buildup and tire failure.

07 Wheels and tires
Changing a wheel
07
188
Changing a wheel
G020331
The spare tire, jack, and crank are located
under the carpet on the floor of the trunk.
To change a tire:
1. Apply the parking brake.
2.
Put the gear selector in Park (P) or reverse
on models with a manual transmission.
3. Block the wheels that are on the ground
with wooden blocks or large stones.
4. Remove the wheel cover (where applica-
ble) using the lug wrench in the tool bag.
G020332
5. With the car still on the ground, use the lug
wrench to loosen the wheel nuts 1/2–1 turn
by exerting downward pressure. Turn the
nuts counterclockwise to loosen.
6. There are two jack attachment points on
each side of the car. Position the jack cor-
rectly in the attachment (see the illustration)
and crank while simultaneously guiding the
base of the jack to the ground. The base of
the jack must be flat on a level, firm, non-
slippery surface. Before raising the car,
check that the jack is still correctly posi-
tioned in the attachment.Jack attachment points
7. Raise the vehicle until the wheel to be
changed is lifted off the ground.
8. Unscrew the wheel nuts completely and
carefully remove the wheel so as not to
damage the threads on the studs.

07 Wheels and tires
Tire Sealing System
07
190* Option/accessory, for more information, see Introduction.
Introduction
Certain models are equipped with a tire sealing
system* that enables you to temporarily seal a
hole in the tread surface and re-inflate a flat tire,
or to adjust a tire’s inflation pressure.
The system consists of an air compressor, a
container for the sealing compound, wiring to
connect the system to the vehicle’s electrical
system via one of the 12-volt sockets, and a
hose used to connect the system to the tire’s
inflation valve.
The 12-volt socket is located in the front tunnel
console.
Accessing the tire sealing systemThe tire sealing system is stowed in the com-
partment in the rear side of the ski hatch in the
center of the rear seat backrest. See page
115 for information on opening this hatch.
1. Lift the floor hatch in the trunk.
2. Lift out the tire sealing system.
NOTE
•The tire sealing system is only intended
to seal holes on the tire’s tread area, not
the sidewall.
•Tires with large holes or tears cannot be
repaired with the tire sealing system.
•After use, stow the tire sealing system
properly to help prevent rattling.
WARNING
•After using the tire sealing system, the
vehicle should not be driven farther than
approximately 120 miles (200 km).
•Have the tire inspected by a trained and
qualified Volvo service technician as
soon as possible to determine if it can
be permanently repaired or must be
replaced.
•The vehicle should not be driven faster
than 50 mph (80 km/h) while using a tire
that has been temporarily repaired with
the tire sealing system.
•After using the tire sealing system, drive
carefully and avoid abrupt steering
maneuvers and sudden stops.
Tire sealing system–overview
G020400
Speed limit sticker
On/Off switch
Electrical wire
Bottle holder (orange cover)
Protective hose cover
Air release knob
Hose
Bottle with sealing compound
Air pressure gauge