2011 INFINITI QX wheel size

FREEING A FROZEN DOOR LOCK
To prevent a door lock from freezing, apply
deicer through the key hole. If the lock becomes
frozen, heat the key before inserting it into the
key hole or use the Intelligent Key system.
ANTIFREEZE
In the winter when it is anticipated that the
outside temperature will drop below 32°F (0°C),
check antifreeze to assure proper winter protec-
tion. For additional information, see “ENGINE
COOLING SYSTEM” in the “8. Maintenance and
do-it-yourself” section.
BATTERY
If the battery is not fully charged during ex-
tremely cold weather conditions, the battery
fluid may freeze and damage the battery. To
maintain maximum efficiency, the battery
should be checked regularly. For additional
information, see “BATTERY” in the “8. Mainte-
nance and do-it-yourself” section.
DRAINING OF COOLANT WATER
If the vehicle is to be left outside without
antifreeze, drain the cooling system, including
the engine block. Refill before operating the
vehicle. For details, see “ENGINE COOLING SYS-
TEM” in the “8. Maintenance and do-it-yourself”
section.
TIRE EQUIPMENT
SUMMER tires have a tread designed to provide
superior performance on dry pavement. How-
ever, the performance of these tires will be
substantially reduced in snowy and icy condi-
tions. If you operate your vehicle on snowy or
icy roads, INFINITI recommends the use of MUD
& SNOW or ALL SEASON tires on all four wheels.
Consult an INFINITI retailer for the tire type,
size, speed rating and availability information.
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 capabilities of studded snow
tires, on wet or dry surfaces, may be poorer than
that of non-studded snow tires.
Tire chains may be used. For details, see “TIRE
CHAINS” in the “8. Maintenance and do-it-
yourself” section of this manual.
For four-wheel drive
If you install snow tires, they must also be the
same size, brand, construction and tread pat-
tern on all four wheels.
SPECIAL WINTER EQUIPMENT
It is recommended that the following items be
carried in the vehicle during winter:
●A scraper and stiff-bristled brush to remove
ice and snow from the windows and wiper
blades.
● A sturdy, flat board to be placed under the
jack to give it firm support.
● A shovel to dig the vehicle out of snowdrifts.
● Extra window washer fluid to refill the reser-
voir tank.
DRIVING ON SNOW OR ICE
WARNING
● Wet ice (32°F, 0°C and freezing rain), very
cold snow or ice can be slick and very hard to
drive on. The vehicle will have much less
traction or “grip” under these conditions.
Try to avoid driving on wet ice until the road
is salted or sanded.
● Whatever the condition, drive with caution.
Accelerate and slow down with care. If accel-
erating or downshifting too fast, the drive
wheels will lose even more traction.
COLD WEATHER DRIVING
Starting and driving5-101

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
Maintenance and do-it-yourself8-33

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
Maintenance and do-it-yourself8-35

1. Wear indicator
2. Wear indicator location mark
Tire wear and damage
WARNING
●Tires should be periodically in-
spected for wear, cracking, bulging or
objects caught in the tread. If exces-
sive wear, cracks, bulging or deep
cuts are found, the tire(s) should be
replaced.
●The original tires have built-in tread
wear indicators. When wear indica-
tors 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 tech-
nician, because some tire damage
may not be obvious. Replace the tires
as necessary to prevent tire failure
and possible personal injury.
●Improper service of the spare tire may
result in serious personal injury. If it
is necessary to repair the spare tire,
contact an INFINITI retailer.
●For additional information regarding
tires, refer to “Important Tire Safety
Information” (US) or “Tire Safety In-
formation” (Canada) in the Warranty
Information 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.
SDI1663
Maintenance and do-it-yourself8-37

●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. ●
For additional information regarding tires,
refer to “Important Tire Safety Information”
(US) or “Tire Safety Information” (Canada) in
the Warranty Information Booklet.
Four-wheel Drive (4WD) 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 4WD
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
When a spare tire is mounted (TEMPORARY USE
ONLY or conventional), the TPMS will not func-
tion.
8-38Maintenance and do-it-yourself

WHEELS AND TIRES
Road wheel
TypeSizeOffset in (mm)
Conventional and spare 20 × 8J 1.18 (30)
22×8J
Tire
Type SizePressure PSI (kPa) [Cold]
Conventional and spare P275/60R20 114H 35 (240)
P275/50R22 111H
DIMENSIONS
Overall length in (mm) 208.3 (5,290)
Overall width in (mm) 79.9 (2,030)
Overall height in (mm) 75.8 (1,925)
Front tread in (mm) 67.5 (1,715)
Rear tread in (mm) 67.9 (1,725)
Wheelbase in (mm) 121.1 (3,075) If you plan to travel in another country,
you
should first find out if the fuel available is
suitable for your vehicle’s engine.
Using fuel with too low an octane rating may
cause engine damage. All gasoline vehicles
must be operated with unleaded gasoline.
Therefore, avoid taking your vehicle to areas
where appropriate fuel is not available.
When transferring the registration of your ve-
hicle to another country, state, province or dis-
trict, it may be necessary to modify the vehicle
to meet local laws and regulations.
The laws and regulations for motor vehicle
emission control and safety standards vary
according to the country, state, province or
district; therefore, vehicle specifications may
differ.
When any vehicle is to be taken into another
country, state, province or district and regis-
tered, its modifications, transportation, and reg-
istration are the responsibility of the user.
INFINITI is not responsible for any inconvenience
that may result.
WHEN TRAVELING OR REGISTERING YOUR
VEHICLE IN ANOTHER COUNTRY
Technical and consumer information9-9

To access the trailer hitchA, remove the trailer
hitch cover located on the lower part of the rear
bumper.
To remove the trailer hitch cover:
1. Remove the 2 clips. 2. Pull the bottom of the cover straight back-
ward to remove the inner side and upper
clips.
WARNING
Trailer hitch components have specific weight
ratings. Your vehicle may be capable of towing
a trailer heavier than the weight rating of the
hitch components. Never exceed the weight
rating of the hitch components. Doing so can
cause serious personal injury or property
damage.
Hitch ball
Choose a hitch ball of the proper size and
weight rating for your trailer:
●The required hitch ball size is stamped on
most trailer couplers. Most hitch balls also
have the size printed on top of the ball.
● Choose the proper class hitch ball based on
the trailer weight.
● The diameter of the threaded shank of the
hitch ball must be matched to the ball mount
hole diameter. The hitch ball shank should
be no more than 1/16 smaller than the hole
in the ball mount. ●
The threaded shank of the hitch ball must be
long enough to be properly secured to the
ball mount. There should be at least 2
threads showing beyond the lock washer
and nut.
Ball mount
The hitch ball is attached to the ball mount and
the ball mount is inserted into the hitch re-
ceiver. Choose a proper class ball mount based
on the trailer weight. Additionally, the ball
mount should be chosen to keep the trailer
tongue level with the ground.
Weight carrying hitches
A weight carrying or “dead weight” ball mount
is one that is designed to carry the whole
amount of tongue weight and gross weight
directly on the ball mount and on the receiver.
Weight distribution hitch
This type of hitch is also called a “load-leveling”
or “equalizing” hitch. A set of bars attach to the
ball mount and to the trailer to distribute the
tongue weight (hitch weight) of your trailer.
Many vehicles cannot carry the full tongue
weight of a given trailer, and need some of the
tongue weight transferred through the frame
and pushing down on the front wheels. This
gives stability to the tow vehicle.STI0804
9-22Technical and consumer information

Seat belt warning light and chime....2-16
Seat belts .................. 1-18
Seat belts with pretensioners .......1-62
Small children ................ 1-29
Three-point type ............... 1-22
Seat(s) Climate controlled seats ..........2-46
Driver-side memory ............3-30
Heated seats ................ 2-44
Seats .....................1-2
Security system, Vehicle security system . . 2-29
Security system (INFINITI Vehicle Immobilizer
System), Engine start .............. 2-31
Selector lever, Shift lock release .......5-18
Servicing climate control ...........4-40
SETTING button ................. 4-11
Shift lock release Transmission ................ 5-18
Shifting, Automatic transmission .......5-15
SNOW mode ................... 5-93
Snow mode switch ............... 2-49
Spare tire ................. 8-38, 9-9
Spark plugs ................... 8-17
Speedometer ...................2-6
Starting Before starting the engine .........5-13
Jump starting ................ 6-11
Precautions when starting and driving . . 5-2
Push starting ................ 6-13
Starting the engine ............. 5-13
STATUS button ..................4-7
Status light, Front passenger air bag .....1-57
Steering Heated steering wheel ...........2-43
Power steering fluid ............8-12
Power steering system ...........5-94Steering lock release malfunction
indicator
................... 2-23
Steering-wheel-mounted controls for
audio ..................... 4-81
Tilt/telescopic steering ..........3-26
Storage ..................... 2-54
Sun visors .................... 3-26
Sunglasses
holder............... 2-56
Supplemental air bag warning labels .....1-63
Supplemental air bag warning light . . 1-63, 2-16
Supplemental restraint system ........1-50
Precautions on supplemental restraint
system .................... 1-50
Switch Autolight switch .............. 2-37
Fog light switch ............... 2-42
Hazard warning flasher switch ......2-43
Headlight aiming control .........2-39
Headlight switch .............. 2-37
Ignition switch ................ 5-15
Intelligent Brake Assist (IBA) OFF
switch .................... 2-50
Power door lock switch ...........3-5
Snow mode switch ............. 2-49
Turn signal switch ............. 2-42
Vehicle dynamic control (VDC) off
switch .................... 2-51
T
2nd row seat .................. 2-55
3rd row seat .................. 2-56
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
Tilt/telescopic steering ............3-26
Tire Pressure, Low tire pressure warning
light ..................... 2-14
Tire replacement indicator . . . ......2-25
Tires Flat tire ....................6-2
Low tire pressure warning system .....5-3
Tire and Loading information label . 8-31, 9-11
Tire chains ................. 8-35
Tire dressing .................7-4
Tire pressure ................ 8-29
Tire pressure information (display) ....4-9
Tire pressure monitoring system
(TPMS) .................. 5-3, 6-2
Tire rotation ................. 8-36
Types of tires ................ 8-35
Uniform tire quality grading ........9-28
Wheel/tire

size ................9-9
Wheels and tires .............. 8-29
Top Tether strap child restraints ........1-34
Touch screen ...................4-4
Tow mode .................... 5-93
Tow mode switch ................ 2-49
Towing Flat towing ................. 9-28
Tow truck towing .............. 6-14
Towing a trailer ............... 9-17
Towing safety ................ 9-21
TPMS, Tire pressure monitoring system ....5-3
TPMS with Tire Inflation Indicator . . . . . 5-5
TPMS, Tire pressure warning system .....6-2
10-6