tire size INFINITI G-CONVERTIBLE 2012 User Guide

gives the tire’s ratio of height to
width.
4.R: The“R”stands for radial.
5.Two-digit number (16): This num-
ber 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 because it
is not required by law.
7.H: Tire speed rating. You should
not drive the vehicle faster than
the tire speed rating.
SDI1607
Example*2TIN (Tire Identification Number)
for a new tire (example: DOT XX XX
XXX XXXX)
1.DOT: Abbreviation for the “Depart-
ment of Transportation”. The sym-
bol can be placed above, below or
to the left or right of the Tire
Identification Number.
2.Two-digit code: Manufacturer’s
identification mark
3.Two-digit code: Tire size
4.Three-digit code: Tire type code
(Optional)
5.Three-digit code: Date of Manu-
facture
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 sidewall of the
tire.
*3Tire ply composition and materi-
al
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
pressure
This number is the greatest
amount of air pressure that
should be put in the tire. Do
not exceed the maximum per-
Maintenance and do-it-yourself8-33

8-34Maintenance and do-it-yourself
missible inflation pressure.
*5Maximum load rating
This number indicates the max-
imum 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 re-
quires 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,
Intended Outboard Sidewall is (1) the
sidewall that contains a whitewall, bears white lettering or bears manu-
facturer, brand and/or model name
molding that is higher or deeper than
the same molding on the other side-
wall 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.
TYPES OF TIRESGUID-0F3309CD-2C8B-4C37-9605-B2B74CF8D48F
WARNING
.
When changing or replacing tires, be
sure all four tires are of the same type
(Example: Summer, All Season or Snow)
and construction. 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 vehicle 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 Infor-
mation” (Canada) in the Warranty Infor-
mation Booklet.
All season tiresGUID-AA383A95-D373-488B-A8E8-CDBF6791B263INFINITI specifies all season tires on some
models to provide good performance all
year, including snowy and icy road condi-
tions. All Season tires are identified by ALL
SEASON and/or M&S (Mud and Snow) on
the tire sidewall. Snow tires have better
snow traction than All Season tires and
may be more appropriate in some areas.
Summer tiresGUID-B04DEE83-96EC-4740-BF40-CCAB483BBE93INFINITI specifies summer tires on some
models to provide superior performance on
dry roads. Summer tire performance is
substantially reduced 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 tiresGUID-F39DC593-D9CC-4031-A698-A6D6CC4F8C92If 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 prohi-
bit their use. Check local, state and
provincial laws before installing studded
tires. Skid and traction capabilities of
studded snow tires, on wet or dry surfaces,
may be poorer than that of non-studded
snow tires.
TIRE CHAINSGUID-6A88FBD9-125B-4B3A-A7FE-FA86DDB25535Use of tire chains may be prohibited
according to location. Check the local laws
before installing tire chains. When instal-
ling tire chains, make sure they are the
proper size for the tires on your vehicle and
are installed according to the chain man-
ufacturer’s suggestions.Use only SAE
Class S chains. Class“S”chains are used
on vehicles with restricted tire to vehicle
clearance. 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 required to accommo-
date the use of a winter traction device (tire
chains or cables). The minimum clearances
are determined using the factory equipped
tire size. Other types may damage your
vehicle. Use chain tensioners when recom-
mended 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 af-
fected.
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 damage to the various mechanisms
of the vehicle due to some overstress.
CHANGING WHEELS AND TIRESGUID-C94141C8-4836-48A9-86D8-553C9002837B
Tire rotationGUID-459433F2-B0E8-444A-873B-B8B7A6064585Tires 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
installed in place of the front wheels.
The spare 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.
Maintenance and do-it-yourself8-35

Replacing wheels and tiresGUID-9715A1ED-EE7A-41C8-9DA9-0A2EB272D8BAWhen replacing a tire, use the same size,
tread design, speed rating and load carry-
ing capacity as originally equipped. (See
“Specifications”(P.9-8) for recommended
types and sizes of tires and wheels.)
WARNING
. The use of tires other than those
recommended or the mixed use of tires
of different brands, construction (bias,
bias-belted or radial), or tread patterns
can adversely affect the ride, braking,
handling, ground clearance, body-to-tire
clearance, tire chain clearance, speed-
ometer calibration, headlight aim and
bumper height. Some of these effects
may lead to accidents and could result in
serious personal injury.
. If the wheels are changed for any
reason, always replace with wheels
which have the same off-set dimension.
Wheels of a different off-set could cause
premature tire wear, degrade vehicle
handling characteristics and/or interfer-
ence with the brake discs/drums. Such
interference can lead to decreased brak- ing efficiency and/or early brake pad/
shoe wear. See
“Wheels and tires” (P.9-
9) 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 remain on after 1 minute.
Contact your INFINITI retailer as soon as
possible for tire replacement 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 struc-
tural damage and could fail without
warning.
. The use of retread tire is not recom-
mended.
. For additional information regarding
tires, refer to “Important Tire Safety
Information” (US) or“Tire Safety Infor-
mation” (Canada) in the Warranty Infor-
mation Booklet.
Wheel balanceGUID-B04D94A2-8C9A-4662-A08E-3F7335A6B729Unbalanced wheels may affect vehicle
handling and tire life. Even with regular
use, wheels can get out of balance. There-
fore, they should be balanced as required.
Wheel balance service should be per-
formed 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 Book-
let.
Care of wheelsGUID-700A8910-ACB9-4129-951B-D744E6E71328. 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.
Maintenance and do-it-yourself8-37

8-38Maintenance and do-it-yourself
.INFINITI recommends that the road
wheels be waxed to protect against
road salt in areas where it is used
during winter.
Spare tire (TEMPORARY USE ONLY
(T-type) spare tire) (if so equipped)
GUID-B42A4A7B-879D-4F0E-A902-69FB4ABCC6B8Observe 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
pressure. Always keep the pressure of
the TEMPORARY 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 pres- sure for standard tires, as indicated on
the Tire and Loading Information label.
For Tire and Loading Information label
location, see
“Tire and Loading Informa-
tion 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).
. When driving on roads covered with
snow or ice, the TEMPORARY USE ONLY
spare tire should be used on the front
wheels and original tire used on the rear
wheels (drive wheels). Use tire chains
only on the two rear original tires.
. Tire tread of the TEMPORARY USE ONLY
spare tire will wear at a faster rate than
the standard tire. Replace the spare tire
as soon as the tread wear indicators
appear.
. Do not use the spare tire on other
vehicles.
. Do not use more than one spare tire at
the same time.
CAUTION
.Do not use tire chains on a TEMPORARY
USE ONLY spare tire. Tire chains will not
fit properly and may cause damage to
the vehicle.
. Because the TEMPORARY USE ONLY
spare tire is smaller than the original
tire, ground clearance is reduced. To
avoid damage to the vehicle, do not
drive over obstacles. Also do not drive
the vehicle through an automatic car
wash since it may get caught.
Emergency tire puncture repair kit
(if so equipped)
GUID-FAD28AE4-EFCF-49D5-B78F-E11D9F52D1B1The emergency tire puncture repair kit
(Emergency 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.

WHEELS AND TIRESGUID-BF695FB1-A128-40E0-83FB-F9B7F1F736C8
Road wheelGUID-C244147F-9E0A-4B2A-B0ED-6562EFEE778DTypeSize Offset in (mm)
Aluminum Front:
Rear:
18
68J
18 68-1/2J 1.69 (43)
1.06 (27)
Front:
Rear: 19
68-1/2J
19 69J 1.69 (43)
1.18 (30)
Spare* 1864T 0 (0)
TireGUID-223AC930-7942-4B14-8716-9ED2E1C87E08TypeSize Pressure PSI (kPa) [Cold]
Conventional Front:
Rear:
P225/50R18 94V
P245/45R18 96V
38 (260)
Front:
Rear: 225/45R19 96W XL
245/40R19 98W XL
39 (270)
Spare (T-type)* T145/70R18 107M 60 (420)
*: if so equipped.
Technical and consumer information9-9

Theft (INFINITI Vehicle Immobilizer
System), Engine start...
........................................ 2-29
Thigh extension ...
.................................................. 1-5
Three-way catalyst ...
.............................................. 5-4
Tilt/telescopic steering ...
...................................... 3-34
Tire Pressure, Low tire pressure warning light ...
.... 2-12
Sealant ...
.......................................................... 6-8
Tire replacement indicator ...
............................ 2-23
Tires
Emergency tire puncture repair kit ...
................. 6-8
Flat tire ...
.......................................................... 6-2
Low tire pressure warning system ...
.................. 5-4
Spare tire ...
.................................................... 8-38
Tire and Loading information label ...
...... 8-30, 9-13
Tire chains ...
................................................... 8-35
Tire dressing ...
.................................................. 7-4
Tire pressure ...
................................................ 8-29
Tire pressure monitoring
system (TPMS) ...
....................................... 5-4, 6-2
Tire rotation ...
................................................. 8-35
Types of tires ...
............................................... 8-34
Uniform tire quality grading ...
......................... 9-21
Wheel/tire size ...
.............................................. 9-9
Wheels and tires ...
.......................................... 8-29
Top, Retractable hard top ...
.................................. 3-19
Touch screen system ...
........................................... 4-5
Towing
Flat towing ...
................................................... 9-20
Tow truck towing ...
.......................................... 6-17
Towing a trailer ...
............................................ 9-20 TPMS, Tire pressure monitoring system
...
.............. 5-4
TPMS, Tire pressure warning system ...
................... 6-2
Trailer towing ...
.................................................... 9-20
Transceiver, HomeLink
®Universal Transceiver ...
... 2-53
Transmission Automatic transmission fluid (ATF) ...
............... 8-12
Driving with automatic transmission ...
............ 5-13
Driving with manual transmission ...
................ 5-18
Transmission selector lever lock release ... ...... 5-17
Transmitter (See remote keyless entry system) ...
... 3-14
Traveling or registering your vehicle in
another country ...
................................................ 9-11
Trip computer ...
................................................... 2-25
Trip odometer ...
................................................... 2-25
Trunk Interior trunk lid release ...
.............................. 3-31
Light ...
............................................................ 2-52
Trunk lid ...
...................................................... 3-29
Trunk lid release switch ...
............................... 3-29
Trunk open request switch ...
........................... 3-29
Trunk release power cancel switch ...
............... 3-30
Turn signal switch ...
............................................. 2-37
U
Underbody cleaning ...
............................................ 7-3
Uniform tire quality grading ...
.............................. 9-21
USB memory operation ...
..................................... 4-61
V
Vanity mirror ...
..................................................... 3-37
Vanity mirror lights ...
........................................... 2-52
Variable voltage control system ...
........................ 8-17
Vehicle
Dimensions ...
.................................................. 9-10
Identification number (VIN) ...
.......................... 9-11
Loading information ...
..................................... 9-17
Recovery (freeing a stuck vehicle) ...
................ 6-19
Security system ...
........................................... 2-27
Vehicle dynamic control (VDC) off switch ...
...... 2-41
Vehicle dynamic control (VDC) system ...
.......... 5-54
Vehicle dynamic control (VDC)
warning light ...
............................................... 2-14
Vehicle information and settings (display) ...
...... 4-9
Ventilators ...
........................................................ 4-29
Voice command (Bluetooth
®Hands-Free
Phone System) ...
................................................ 4-101
Voice command (INFINITI voice
recognition system) ...
............................. 4-116, 4-126
Voice recognition system ...
................................ 4-109
Voice recognition, Alternate command mode ...
... 4-123
Voice recognition, Standard mode ...
................... 4-109
W
Walk-in mechanism ...
............................................. 1-6
Warning Dot matrix display ...
....................................... 2-17
Hazard warning flasher switch ...
..................... 2-38
10-7

10-8
Lights...
.......................................................... 2-10
Tire pressure monitoring
system (TPMS) ...
....................................... 5-4, 6-2
Warning/indicator lights and
audible reminders ...
........................................ 2-10
Warning labels, Air bag warning labels ...
............. 1-48
Warning light
Air bag warning light ...
......................... 1-48, 2-14
Anti-lock braking system (ABS)
warning light ...
............................................... 2-10
Brake warning light ...
...................................... 2-11
Intelligent Key warning light ...
........................ 2-12
Low tire pressure warning light ...
.................... 2-12
Seat belt warning light ...
................................ 2-14
Warranty, Emission control system warranty ...
..... 9-22
Washer switch, Windshield wiper and
washer switch ...
................................................... 2-30
Washing ...
............................................................. 7-2
Waxing ...
............................................................... 7-3
Wheel/tire size ...
................................................... 9-9
Wheels and tires ...
............................................... 8-29
Cleaning aluminum alloy wheels ...
.................... 7-3
Window washer fluid ...
........................................ 8-14
Window(s) Automatic adjusting function ...
....................... 2-50
Cleaning ...
........................................................ 7-3
Power windows ...
............................................ 2-48
Windshield wiper and washer switch ...
................ 2-30 Wiper
Rain-sensing auto wiper system ...
................... 2-32
Windshield wiper and washer switch ...
........... 2-30
Wiper blades ...
............................................... 8-20
X
Xenon headlights ...
.............................................. 2-33