2011 INFINITI EX tire size

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
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.
8-34Maintenance and do-it-yourself

CHANGING WHEELS AND TIRES
Tire rotation
INFINITI recommends rotating the tires
every 7,500 miles (12,000 km). (See
“FLAT TIRE” in the “6. In case of emer-
gency” section for tire replacing proce-
dures.)
As soon as possible, tighten the wheel
nuts to the specified torque with a torque
wrench.Wheel nut tightening torque:
80 ft-lb (108 N·m)
The wheel nuts must be kept tightened to
the specification at all times. It is recom-
mended that wheel nuts be tightened to
the specification at each tire rotation in-
terval.
WARNING
●After rotating the tires, check and ad-
just the tire pressure.
●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.).
●Do not include the T-type spare tire or
any other small size spare tire in the tire
rotation.
●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.
SDI1662SDI1663
Maintenance and do-it-yourself8-35

●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,
always replace with wheels which have the
same off-set dimension. Wheels of a differ-
ent off-set could cause premature tire wear,
degrade vehicle handling characteristics
and/or interference with the brake
discs/drums. Such interference can lead to
decreased braking efficiency 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.
8-36Maintenance and do-it-yourself

●For additional information regarding tires,
refer to “Important Tire Safety Information”
(US) or “Tire Safety Information” (Canada) in
the Warranty Information Booklet.
All-Wheel Drive (AWD) models
CAUTION
● Always use tires of the same type, size,
brand, construction (bias, bias-belted or ra-
dial), and tread pattern on all four wheels.
Failure to do so may result in a circumference
difference between tires on the front and
rear axles which will cause excessive tire
wear and may damage the transmission,
transfer case and differential gears.
● ONLY use spare tires specified for the AWD
model.
If excessive tire wear is found, it is recom-
mended that all four tires be replaced with tires
of the same size, brand, construction and tread
pattern. The tire pressure and wheel alignment
should also be checked and corrected as nec-
essary. Contact an INFINITI retailer.
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
See “CLEANING EXTERIOR” in the “7. Appear-
ance and care” section for details about care of
the wheels.
Spare tire (TEMPORARY USE ONLY
(T-type) spare tire)
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).
● When driving on roads covered with snow or
ice, the TEMPORARY USE ONLY spare tire
should be used on the front wheels and origi-
nal tire used on the rear wheels (drive
wheels). Use tire chains only on the two rear
original tires.
Maintenance and do-it-yourself8-37

WHEELS AND TIRES
Road wheel
TypeSize Offset in (mm)
Conventional 18 × 8J 1.85 (47)
19×8J
Spare 17 × 4T 1.18 (30)
Tire
TypeSize Pressure PSI (kPa) [Cold]
Conventional P225/55R18
33 (230)
P245/45R19
Spare (T-type) T165/80R17
60 (420)
T165/80D17
9-8Technical and consumer information

Infants.................... .1-19
Injured persons ............... .1-15
Larger children ............... .1-20
Precautions on seat belt usage .......1-12
Pregnant women .............. .1-15
Rear center seat belt .............1-18
Seat belt cleaning .............. .7-5
Seat belt extenders ............. .1-18
Seat belt maintenance ............1-18
Seat belt warning light and chime .....2-16
Seat belts .................. .1-12
Seat belts with pretensioners ........1-48
Shoulder belt height adjustment ......1-17
Small children ................ .1-19
Three-point type............... .1-15
Seat synchronization function .........3-25
Seat(s) Driver-side memory .............3-24
Heated seats ................ .2-40
Seats ..................... .1-2
Seat-mounted jacket hanger ..........2-47
Security system, Vehicle security system . . .2-29
Security system (INFINITI Vehicle Immobilizer
System), Engine start ..............2-31
Selector lever Shift lock release .............. .5-15
Servicing climate control ............4-47
SETTING button ................. .4-12
SHIFT “P” warning ............... .2-23
Shift lock release Transmission ................ .5-15
Shifting, Automatic transmission ........5-12
Shoulder belt height adjustment, For front
seats ....................... .1-17
Snow mode switch ............... .2-43
Spare tire .................... .9-8Spark plugs
................... .8-16
Speedometer ................... .2-6
Starting Before starting the engine ..........5-11
Jump

starting ................ .6-8
Precautions when starting and driving . . .5-2
Push starting ................ .6-10
Starting the engine ............. .5-11
STATUS button .................. .4-8
Status light, Front passenger air bag .....1-44
Steering Power steering fluid .............8-11
Power steering system ............5-77
Steering lock ................. .5-9
Steering lock release malfunction
indicator .................. .2-23
Steering-wheel-mounted controls for
audio .................... .4-90
Tilting telescopic steering column .....3-19
Storage ..................... .2-45
Sun visors ................... .3-20
Sunglasses holder ............... .2-46
Supplemental air bag warning labels .....1-49
Supplemental air bag warning light . . .1-49, 2-16
Supplemental restraint system .........1-37
Precautions on supplemental restraint
system .................... .1-37
Switch Autolight switch .............. .2-35
Fog light switch .............. .2-39
Hazard warning flasher switch .......2-39
Headlight switch .............. .2-35
Ignition switch ............... .5-12
Intelligent Brake Assist (IBA) OFF switch .2-43
Power door lock switch ............3-5 Rear window and outside mirror defroster
switch
.................... .2-34
Snow mode switch ............. .2-43
Turn signal switch ............. .2-39
Vehicle dynamic control (VDC) off switch .2-43
Warning systems switch ..........2-42
T
Tachometer .................... .2-7
Temperature gauge, Engine coolant
temperature gauge ............... .2-7
Theft (INFINITI Vehicle Immobilizer System),
Engine start ................... .2-31
Three-way catalyst ................ .5-2
Tire Pressure, Low tire pressure warning
light ..................... .2-15
Tire
replacement indicator .........2-26
Tires Flat tire .................... .6-2
Low tire pressure warning system ......5-3
Spare tire .................. .8-37
Tire and Loading information label .8-29, 9-11
Tire chains ................. .8-34
Tire dressing ................. .7-4
Tire pressure ................ .8-28
Tire pressure monitoring system
(TPMS) .................. .5-3, 6-2
Tire rotation ................ .8-35
Types of tires ................ .8-33
Uniform tire quality grading . . . . .....9-17
Wheel/tire size ............... .9-8
Wheels and tires .............. .8-28
Tonneau cover (see cargo cover) . . ......2-48
10-6

Touch screen system.............. .4-5
Towing Flat towing ................. .9-17
Tow truck towing .............. .6-11
Towing a trailer ............... .9-17
TPMS, Tire pressure monitoring system .....5-3
TPMS, Tire pressure warning system ......6-2
Trailer towing .................. .9-17
Transceiver, HomeLink Universal
Transceiver ................... .2-57
Transmission Automatic transmission fluid (ATF) .....8-11
Driving with automatic transmission . . . .5-12
Transmission selector lever lock release . .5-15
Transmitter (See remote keyless entry
system) ..................... .3-13
Traveling or registering your vehicle in
another country ................. .9-9
Trip computer .................. .2-27
Trip odometer ................. .2-27
Turn signal switch ............... .2-39
U
Underbody cleaning ............... .7-3
Uniform tire quality grading ...........9-17
USB memory operation .............4-70
V
Vanity mirror .................. .3-24
Vanity mirror lights .............. .2-56
Variable voltage control system ........8-15
Vehicle Dimensions ................. .9-9Identification number (VIN)
.........9-10
Loading information .............9-13
Recovery (freeing a stuck vehicle) .....6-14
Security system .............. .2-29
Vehicle dynamic control (VDC) off switch .2-43
Vehicle dynamic control (VDC) system . . .5-82
Vehicle dynamic control (VDC) warning
light ..................... .2-17
Vehicle information and settings
(display) ................... .4-8
Ventilators ................... .4-38
Voice command (Bluetooth Hands-Free
Phone System) ................ .4-108
Voice command (INFINITI voice recognition
system) ................. .4-122,

4-132
Voice recognition system ............4-116
Voice recognition, Alternate command
mode ...................... .4-129
Voice recognition, Standard mode ......4-116
W
Warning Dot matrix display ............. .2-20
Hazard warning flasher switch .......2-39
Lane departure warning (LDW) system . . .5-18
Lights .................... .2-12
Tire pressure monitoring system
(TPMS) .................. .5-3, 6-2
Warning/indicator lights and audible
reminders .................. .2-11
Warning labels, Air bag warning labels . . . .1-49
Warning light Air bag warning light .........1-49, 2-16
All-wheel drive (AWD) warning light . . . .2-12 Anti-lock braking system (ABS) warning
light
..................... .2-12
Brake warning light .............2-13
Intelligent Key warning light ........2-14
Lane departure warning light ........2-14
Low tire pressure warning light . ......2-15
Seat belt warning light and chime .....2-16
Warranty, Emission control system
warranty ..................... .9-18
Washer switch, Windshield wiper and
washer switch ................. .2-32
Washing ..................... .7-2
Waxing ...................... .7-2
Welcome light ................. .2-54
Wheel/tire size ................. .9-8
Wheels and tires ................ .8-28
Care of wheels ................ .7-3
Cleaning aluminum alloy wheels .......7-3
Window washer fluid .............. .8-12
Window(s) Cleaning ................... .7-3
P1ower windows .............. .2-50
Windshield wiper and washer switch . . . . .2-32
Wiper Windshield wiper and washer switch . . .2-32
Wiper blades ................ .8-17
X
Xenon headlights ............... .2-34
10-7