tire size INFINITI G-CONVERTIBLE 2011 User Guide

TIRE LABELING
Federal law requires tire manufacturers
to place standardized information on the
sidewall of all tires. This information
identifies and describes the fundamen-
tal characteristics of the tire and also
provides the tire identification number
(TIN) for safety standard certification.
The TIN can be used to identify the tire in
case of a recall.
1Tire size (example: P215/60R16 94H)
1.P: The “P” indicates the tire is de-
signed for passenger vehicles. (Not all
tires have this information.)
2.Three-digit number (215): This num-
ber gives the width in millimeters of
the tire from sidewall edge to side-
wall edge.
3.Two-digit number (60): This number,
known as the aspect ratio, gives the
tire’s ratio of height to width.
4.R: The “R” stands for radial.
5.Two-digit number (16): This number is
the wheel or rim diameter in inches.
6.Two- or three-digit number (94): This
number is the tire’s load index. It is a
measurement of how much weight
each tire can support. You may not
find this information on all tires be-
cause it is not required by law.
7.H: Tire speed rating. You should not
drive the vehicle faster than the tire
speed rating.
Example
SDI1575
Example
SDI1606
8-30Maintenance and do-it-yourself

2TIN (Tire Identification Number) for a
new tire (example: DOT XX XX XXX
XXXX)
1.DOT: Abbreviation for the “Department
of Transportation”. The symbol can be
placed above, below or to the left or
right of the Tire Identification Number.
2.Two-digit code: Manufacturer’s iden-
tification mark
3.Two-digit code: Tire size
4.Three-digit code: Tire type code (Op-
tional)
5.Three-digit code: Date of Manufacture
6.Four numbers represent the week and
year the tire was built. For example,
the numbers 3103 means the 31st
week of 2003. If these numbers are
missing, then look on the other side-
wall of the tire.
3Tire ply composition and material
The number of layers or plies of
rubber-coated fabric in the tire.
Tire manufacturers also must indicate
the materials in the tire, which include
steel, nylon, polyester, and others.
4Maximum permissible inflation pres-
sure
This number is the greatest amount
of air pressure that should be put in
the tire. Do not exceed the maximum
permissible inflation pressure.
5Maximum load rating
This number indicates the maximum
load in kilograms and pounds that can
be carried by the tire. When replacing
the tires on the vehicle, always use a tire that has the same load rating as
the factory installed tire.
6Term of “tubeless” or “tube type”
Indicates whether the tire requires an
inner tube (“tube type”) or not
(“tubeless”).
7The word “radial”
The word “radial” is shown, if the tire
has radial structure.
8Manufacturer or brand name
Manufacturer or brand name is shown.
Other tire-related terminology:
In addition to the many terms that are
defined throughout this section, In-
tended Outboard Sidewall is (1) the side-
wall that contains a whitewall, bears
white lettering or bears manufacturer,
brand and/or model name molding that
is higher or deeper than the same mold-
ing on the other sidewall of the tire, or
(2) the outward facing sidewall of an
asymmetrical tire that has a particular
side that must always face outward
when mounted on a vehicle.
Example
SDI1607
Maintenance and do-it-yourself8-31

TYPES OF TIRES
WARNING
●When changing or replacing tires, be sure all
four tires are of the same type (Example:
Summer, All Season or Snow) and construc-
tion. An INFINITI retailer may be able to help
you with information about tire type, size,
speed rating and availability.
● Replacement tires may have a lower speed
rating than the factory equipped tires, and
may not match the potential maximum ve-
hicle speed. Never exceed the maximum
speed rating of the tire.
● Replacing tires with those not originally
specified by INFINITI could affect the proper
operation of the TPMS.
● For additional information regarding tires,
refer to “Important Tire Safety Information”
(US) or “Tire Safety Information” (Canada) in
the Warranty Information Booklet.
All season tires
INFINITI specifies all season tires on some
models to provide good performance all year,
including snowy and icy road conditions. All
Season tires are identified by ALL SEASON
and/or M&S (Mud and Snow) on the tire side- wall. Snow tires have better snow traction than
All Season tires and may be more appropriate in
some areas.
Summer tires
INFINITI specifies summer tires on some models
to provide superior performance on dry roads.
Summer tire performance is substantially re-
duced in snow and ice. Summer tires do not
have the tire traction rating M&S on the tire
sidewall.
If you plan to operate your vehicle in snowy or
icy conditions, INFINITI recommends the use of
SNOW tires or ALL SEASON tires on all four
wheels.
Snow tires
If snow tires are needed, it is necessary to
select tires equivalent in size and load rating to
the original equipment tires. If you do not, it can
adversely affect the safety and handling of your
vehicle.
Generally, snow tires will have lower speed
ratings than factory equipped tires and may not
match the potential maximum vehicle speed.
Never exceed the maximum speed rating of the
tire.
If you install snow tires, they must be the same
size, brand, construction and tread pattern on
all four wheels.
For additional traction on icy roads, studded
tires may be used. However, some U.S. states
and Canadian provinces prohibit their use.
Check local, state and provincial laws before
installing studded tires. Skid and traction capa-
bilities of studded snow tires, on wet or dry
surfaces, may be poorer than that of non-
studded snow tires.
TIRE CHAINS
Use of tire chains may be prohibited according
to location. Check the local laws before install-
ing tire chains. When installing tire chains,
make sure they are the proper size for the tires
on your vehicle and are installed according to
the chain manufacturer’s suggestions.
Use only
SAE Class S chains. Class “S” chains are used
on vehicles with restricted tire to vehicle clear-
ance. Vehicles that can use Class “S” chains are
designed to meet the SAE standard minimum
clearances between the tire and the closest
vehicle suspension or body component re-
quired to accommodate the use of a winter
traction device (tire chains or cables). The mini-
mum clearances are determined using the fac-
tory equipped tire size. Other types may dam-
age your vehicle. Use chain tensioners when
8-32Maintenance and do-it-yourself

recommended by the tire chain manufacturer to
ensure a tight fit. Loose end links of the tire
chain must be secured or removed to prevent
the possibility of whipping action damage to
the fenders or underbody. If possible, avoid
fully loading your vehicle when using tire
chains. In addition, drive at a reduced speed.
Otherwise, your vehicle may be damaged
and/or vehicle handling and performance may
be adversely affected.
Tire chains must be installed only on the rear
wheels and not on the front wheels.
Never install tire chains on a TEMPORARY USE
ONLY spare tire.
Do not use tire chains on dry roads. Driving with
tire chains in such conditions can cause dam-
age to the various mechanisms of the vehicle
due to some overstress.
CHANGING WHEELS AND TIRES
Tire rotation
Tires cannot be rotated on this vehicle
because the front tires are a different
size than the rear tires.
A pin is on the front brake rotor to
prevent the rear wheels from being in-
stalled in place of the front wheels. Thespare tire can be installed in place of the
front and rear wheels. When installing
the spare tire in the front wheel, the hole
in the spare tire wheel must be aligned
with the pin on the brake rotor.
WARNING
●Retighten the wheel nuts when the ve-
hicle has been driven for 600 miles
(1,000 km) (also in cases of a flat tire,
etc.).
●For additional information regarding
tires, refer to “Important Tire Safety In-
formation” (US) or “Tire Safety Informa-
tion” (Canada) in the Warranty Informa-
tion Booklet.1. Wear indicator
2. Wear indicator location mark
Tire wear and damage
WARNING
●Tires should be periodically inspected
for wear, cracking, bulging or objects
caught in the tread. If excessive wear,
cracks, bulging or deep cuts are found,
the tire(s) should be replaced.
SDI1663
Maintenance and do-it-yourself8-33

●The original tires have built-in tread
wear indicators. When wear indicators
are visible, the tire(s) should be
replaced.
●Tires degrade with age and use. Have
tires, including the spare, over 6 years
old checked by a qualified technician,
because some tire damage may not be
obvious. Replace the tires as necessary
to prevent tire failure and possible per-
sonal injury.
●Improper service of the spare tire may
result in serious personal injury. If it is
necessary to repair the spare tire, con-
tact an INFINITI retailer.
●For additional information regarding
tires, refer to “Important Tire Safety In-
formation” (US) or “Tire Safety Informa-
tion” (Canada) in the Warranty Informa-
tion Booklet.
Replacing wheels and tires
When replacing a tire, use the same size, tread
design, speed rating and load carrying capacity as originally equipped. (See “SPECIFICATIONS”
in the “9. Technical and consumer information”
section for recommended types and sizes of
tires and wheels.)
WARNING
●
The use of tires other than those recom-
mended or the mixed use of tires of different
brands, construction (bias, bias-belted or ra-
dial), or tread patterns can adversely affect
the ride, braking, handling, ground clear-
ance, body-to-tire clearance, tire chain
clearance, speedometer calibration, head-
light aim and bumper height. Some of these
effects may lead to accidents and could re-
sult in serious personal injury.
●
If the wheels are changed for any reason, al-
ways replace with wheels which have the
same off-set dimension. Wheels of a different
off-set could cause premature tire wear, de-
grade vehicle handling characteristics and/or
interference with the brake discs/drums. Such
interference can lead to decreased braking ef-
ficiency and/or early brake pad/shoe wear.
See “WHEELS AND TIRES” in the “9. Technical
and consumer information” section of this
manual for wheel off-set dimensions.
● When a spare tire is mounted or a wheel is
replaced, the TPMS will not function and the
low tire pressure warning light will flash for
approximately 1 minute. The light will re-
main on after 1 minute. Contact your INFINITI
retailer as soon as possible for tire replace-
ment and/or system resetting.
● Replacing tires with those not originally
specified by INFINITI could affect the proper
operation of the TPMS.
● Do not install a damaged or deformed wheel
or tire even if it has been repaired. Such
wheels or tires could have structural damage
and could fail without warning.
● The use of retread tire is not recommended.
● For additional information regarding tires,
refer to “Important Tire Safety Information”
(US) or “Tire Safety Information” (Canada) in
the Warranty Information Booklet.
8-34Maintenance and do-it-yourself

Wheel balance
Unbalanced wheels may affect vehicle handling
and tire life. Even with regular use, wheels can
get out of balance. Therefore, they should be
balanced as required.
Wheel balance service should be performed with
the wheels off the vehicle. Spin balancing the
wheels on the vehicle could lead to mechanical
damage.
For additional information regarding tires, refer
to “Important Tire Safety Information” (US) or
“Tire Safety Information” (Canada) in the
INFINITI Warranty Information Booklet.
Care of wheels
●Wash the wheels when washing the vehicle
to maintain their appearance.
● Clean the inner side of the wheels when the
wheel is changed or the underside of the
vehicle is washed.
● Do not use abrasive cleaners when washing
the wheels.
● Inspect wheel rims regularly for dents or
corrosion. Such damage may cause loss of
pressure or poor seal at the tire bead.
● INFINITI recommends that the road wheels
be waxed to protect against road salt in
areas where it is used during winter.
Emergency tire puncture repair kit (if
so equipped)
The emergency tire puncture repair kit (Emer-
gency Tire Sealant) is supplied with the vehicle
instead of a spare tire. It can be used to
temporarily repair minor tire punctures.
If possible, have the vehicle towed to a facility
that can repair or replace the flat tire. Using the
emergency tire puncture repair kit may cause a
malfunction of the tire pressure sensor and
cause the low tire pressure warning light to
illuminate.
See “FLAT TIRE” in the “6. In case of emer-
gency” section for more details.
Spare tire (TEMPORARY USE ONLY
(T-type) spare tire) (if so equipped)
Observe the following precautions if the T-type
spare tire must be used, otherwise your vehicle
could be damaged or involved in an accident.
WARNING
● The T-type spare tire should be used for
emergency use. It should be replaced with
the standard tire at the first opportunity to
avoid possible tire or differential damage.
● Drive carefully while the TEMPORARY USE
ONLY spare tire is installed. Avoid sharp
turns and abrupt braking while driving.
● Periodically check spare tire inflation pres-
sure. Always keep the pressure of the TEM-
PORARY USE ONLY spare tire at 60 psi (420
kPa, 4.2 bar). Always keep the pressure of
the full size spare tire (if so equipped) at the
recommended pressure for standard tires,
as indicated on the Tire and Loading Infor-
mation label. For Tire and Loading Informa-
tion label location, see “Tire and Loading
Information label” in the index of this
manual.
● With the TEMPORARY USE ONLY spare tire
installed do not drive your vehicle at speeds
faster than 50 MPH (80 km/h).
Maintenance and do-it-yourself8-35

WHEELS AND TIRES
Road wheel
TypeSize Offset in (mm)
Aluminum Front: 18 × 8J 1.69 (43)
Rear: 18 × 8-1/2J 1.06 (27)
Front: 19 × 8-1/2J 1.69 (43)
Rear: 19 × 9J 1.18 (30)
Spare*1 18 × 4T 0 (0)
Tire
TypeSize Pressure PSI (kPa) [Cold]
Conventional Front: P225/50R18 94V 38 (260)
Rear: P245/45R18 96V
Front: 225/45R19 96W XL 39 (270)
Rear: 245/40R19 98W XL
Spare (T-type)*1 T145/70R18 107M 60 (420)
*1: if so equipped.
9-8Technical and consumer information

Driver-side memory.............3-37
Heated seats ................ .2-37
Seats ..................... .1-2
Security system, Vehicle security system . . .2-26
Security system (INFINITI Vehicle
Immobilizer System), Engine start .......2-27
Selector lever Shift lock release .............. .5-16
Separator, Retractable hard top ........3-20
Servicing climate control ............4-36
SETTING button ................. .4-12
Shift “P” warning (Automatic Transmission
models) ..................... .2-18
Shift lock release, Transmission ........5-16
Shifting Automatic transmission ...........5-12
Manual transmission .............5-16
Sliding front passenger’s seat ..........1-5
Sonar system .................. .5-45
Sonar system off switch .............5-47
Spare tire .................... .9-8
Spark plugs ................... .8-16
Speedometer ................... .2-5
Starting Before starting the engine ..........5-11
Jump starting ................ .6-14
Precautions when starting and driving . . .5-2
Push starting ................ .6-16
Starting the engine ............. .5-11
STATUS button .................. .4-7
Status light, Front passenger air bag .....1-42
Steering Power steering fluid .............8-11
Power steering system ...........5-47
Steering lock ................. .5-9
Steering lock release malfunction indicator
................... .2-18
Steering-wheel-mounted controls for
audio .................... .4-82
Tilt/telescopic steering ...........3-33
Storage ..................... .2-43
Storage box .................. .2-46
Sun visors ................... .3-34
Supplemental
air bag warning labels .....1-48
Supplemental air bag warning light . . .1-48, 2-12
Supplemental restraint system .........1-35
Precautions on supplemental restraint
system .................... .1-35
Switch Autolight switch .............. .2-32
Fog light switch .............. .2-36
Hazard warning flasher switch .......2-36
Headlight switch .............. .2-32
Ignition switch ............... .5-12
Ignition switch manual transmission
models .................... .5-16
Power door lock switch ............3-5
Rear window and outside mirror defroster
switch .................... .2-31
Retractable hard top switch .....3-23, 3-25
Turn signal switch ............. .2-35
Vehicle dynamic control (VDC) off switch .2-39
T
Tachometer ................... .2-6
Temperature gauge, Engine coolant
temperature gauge ............... .2-6
Theft (INFINITI Vehicle Immobilizer System),
Engine start ................... .2-27
Thigh extension ................. .1-5Three-way catalyst
................ .5-2
Tilt/telescopic steering .............3-33
Tire Pressure, Low tire pressure warning
light ..................... .2-10
Sealant .................... .6-3
Tire replacement indicator . . .......2-22
Tires Emergency tire puncture repair kit .....6-3
Flat tire .................... .6-2
Low tire pressure warning system ......5-3
Spare tire .................. .8-35
Tire and Loading information label .8-28, 9-11
Tire chains ................. .8-32
Tire dressing ................. .7-3
Tire pressure ................ .8-27
Tire pressure monitoring system
(TPMS) .................. .5-3, 6-2
Tire rotation ................ .8-33
Types of tires ................ .8-32
Uniform
tire quality grading .........9-19
Wheel/tire size ............... .9-8
Wheels and tires .............. .8-27
Top, Retractable hard top ............3-18
Touch screen system .............. .4-4
Towing Flat towing ................. .9-19
Tow truck towing .............. .6-17
Towing a trailer ............... .9-19
TPMS, Tire pressure monitoring system .....5-3
TPMS, Tire pressure warning system ......6-2
Trailer towing .................. .9-19
Transceiver, HomeLink Universal
Transceiver ................... .2-51
Transmission Automatic transmission fluid (ATF) .....8-11
10-6

Driving with automatic transmission . . . .5-12
Driving with manual transmission.....5-16
Transmission selector lever lock release. .5-16
Transmitter (See remote keyless entry
system) ..................... .3-14
Traveling or registering your vehicle in
another country ................. .9-9
Trip computer ................. .2-23
Trip odometer ................. .2-24
Trunk Interior trunk lid release ..........3-30
Light ..................... .2-51
Trunk lid .................. .3-28
Trunk lid release switch ...........3-28
Trunk open request switch .........3-28
Trunk release power cancel switch .....3-29
Turn signal switch ............... .2-35
U
Underbody cleaning ............... .7-3
Uniform tire quality grading ...........9-19
USB memory operation .............4-62
V
Vanity mirror .................. .3-36
Vanity mirror lights ............... .2-51
Variable voltage control system ........8-15
Vehicle Dimensions ................. .9-9
Identification number (VIN) .........9-10
Loading information .............9-16
Recovery (freeing a stuck vehicle) .....6-19
Security system .............. .2-26Vehicle dynamic control (VDC) off switch .2-39
Vehicle dynamic control (VDC) system . . .5-52
Vehicle dynamic control (VDC) warning
light
..................... .2-13
Vehicle information and settings (display) .4-7
Ventilators ................... .4-28
Voice command (Bluetooth Hands-Free
Phone System) ................ .4-101
Voice command (INFINITI voice recognition
system) ................. .4-115, 4-125
Voice recognition system ...........4-109
Voice recognition, Alternate command
mode ...................... .4-122
Voice recognition, Standard mode ......4-109
W
Walk-in

mechanism ............... .1-6
Warning Dot matrix display ............. .2-16
Hazard warning flasher switch .......2-36
Lights ..................... .2-9
Tire pressure monitoring system
(TPMS) .................. .5-3, 6-2
Warning/indicator lights and audible
reminders .................. .2-8
Warning labels, Air bag warning labels . . . .1-48
Warning light Air bag warning light .........1-48, 2-12
Anti-lock braking system (ABS) warning
light ...................... .2-9
Brake warning light ............. .2-9
Intelligent Key warning light ........2-10
Low tire pressure warning light .......2-10
Seat belt warning light ...........2-12 Warranty, Emission control system
warranty
.................... .9-20
Washer switch, Windshield wiper and
washer switch ................. .2-28
Washing ..................... .7-2
Waxing ...................... .7-2
Wheel/tire size ................. .9-8
Wheels and tires ................ .8-27
Cleaning aluminum alloy wheels .......7-3
Window washer fluid .............. .8-13
Window(s) Automatic adjusting function ........2-48
Cleaning ................... .7-3
Power windows .............. .2-46
Windshield wiper and washer switch .....2-28
Wiper Rain-sensing auto wiper system ......2-30
Windshield wiper and washer switch . . .2-28
Wiper blades ................ .8-18
X
Xenon headlights ................ .2-31
10-7