tire size INFINITI QX30 2017 User Guide

slight pulsation. This is normal and indicates
that the Brake Assist System is operating (if
equipped).
Using brakes
Avoid resting your foot on the brake pedal while
driving. This will overheat the brakes, wear out
the brake linings/pads faster, and increase fuel
consumption.
To help reduce brake wear and to prevent the
brakes from overheating, reduce speed and
downshift to a lower gear before going down a
slope or long grade. Overheated brakes may
reduce braking performance and could result in
loss of vehicle control.
While driving on a slippery surface, be careful
when braking, accelerating or downshifting.
Abrupt braking or acceleration could cause the
wheels to skid and result in an accident.
Wet brakes
When the vehicle is washed or driven through
water, the brakes may get wet. As a result, your
braking distance will be longer and the vehicle
may pull to one side during braking.
To dry the brakes, drive the vehicle at a safe
speed while lightly depressing the brake pedal
to heat up the brakes. Do this until the brakesreturn to normal. Avoid driving the vehicle at
high speeds until the brakes function correctly.
Driving uphill
When starting on a steep gradient, it is some-
times difficult to operate the brake. Use the
parking brake to hold the vehicle. When ready
to start, make sure that the shift lever is in an
appropriate forward or reverse driving position,
release the parking brake while depressing the
accelerator pedal. If your vehicle has an electric
parking brake, this will automatically release
when you depress the accelerator pedal (DCT
models).
Driving downhill
The engine braking action is effective for con-
trolling the vehicle while descending hills.
A low gear position in the manual shift mode,
low enough to obtain sufficient engine braking,
should be selected.
Parking brake break-in
Break in the parking brake shoes whenever the
stopping effect of the parking brake is weak-
ened or whenever the parking brake shoes
and/or drums/rotors are replaced, in order to
assure the best braking performance.
This procedure is described in the vehicle ser-
vice manual and can be performed by an
INFINITI retailer.
ANTI-LOCK BRAKING SYSTEM (ABS)
WARNING
The Anti-lock Braking System (ABS) is a so-
phisticated device, but it cannot prevent acci-
dents resulting from careless or dangerous
driving techniques. It can help maintain ve-
hicle control during braking on slippery sur-
faces. Remember that stopping distances on
slippery surfaces will be longer than on normal
surfaces even with ABS. Stopping distances
may also be longer on rough, gravel or snow
covered roads, or if you are using tire chains.
Always maintain a safe distance from the ve-
hicle in front of you. Ultimately, the driver is
responsible for safety.
Tire type and condition may also affect braking
effectiveness.
– When replacing tires, install the specified
size of tires on all four wheels.
– When installing a replacement tire, make sure
that it is the proper size and type as specified
on the tire and loading information label. (See
5-88Starting and driving

coolantin the8. Do-it-yourself section of this
manual.
TIRE EQUIPMENT
1. SUMMER tires have a tread designed to provide superior performance on dry pave-
ment. However, the performance of these
tires will be substantially reduced in snowy
and icy conditions. If you operate your ve-
hicle on snowy or icy roads, INFINITI recom-
mends the use of MUD & SNOW or ALL
SEASON TIRES on all four wheels. It is rec-
ommended that you visit an INFINITI retailer
for the tire type, size, speed rating and
availability information.
2. 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.
3. Tire chains may be used if desired. Make sure they are the proper size for the tires on
your vehicle and are installed according to
the chain manufacturer’s instructions. Use
chain tensioners when recommended by the
tire chain manufacturer to ensure a tight fit. Loose end links of the tire chains must be
secured or removed to prevent the possibil-
ity of whipping action damage to the fenders
or underbody. In addition, drive at a reduced
speed, otherwise, your vehicle may be dam-
aged and/or vehicle handling and perfor-
mance may be adversely affected.
SPECIAL WINTER EQUIPMENT
It is recommended that the following items be
carried in the vehicle during the winter:
•A scraper and stiff-bristled brush to remove
ice and snow from the windows.
•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 washer fluid to refill the windshield
washer fluid reservoir.
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 ac-
celerating or downshifting too fast, the
drive wheels will lose even more traction.
•Allow more stopping distance under these
conditions. Braking should be started
sooner than on dry pavement.
•Allow greater following distances on slip-
pery roads.
•Watch for slippery spots (glare ice). These
may appear on an otherwise clear road in
shaded areas. If a patch of ice is seen ahead,
brake before reaching it. Try not to brake
while on the ice, and avoid any sudden
steering maneuvers.
•Do not use cruise control on slippery roads.
•Snow can trap dangerous exhaust gas un-
der your vehicle. Keep snow clear of the
exhaust pipe and from around your vehicle.
5-94Starting and driving

WARNING TRIANGLE (IF EQUIPPED)
Removing and refitting the warning
triangle
To remove:
1. Open the lift gate and lift the luggage com-partment floor upwards.
2. To release warning triangle, push back the retainers on the bracket.
3. Remove warning triangle
1from the
bracket.
To refit:
1. Place warning triangle
1back into the
bracket and push down to secure.
2. Fold down the luggage compartment floor.
3. Close the lift gate.
Setting up the warning triangle
1. Fold legs out to the side.
2. Fold side reflectors upwards to form a tri- angle and lock them at the top using press
stud.
RUN-FLAT TIRES
With special run-flat tires, you can continue to
drive your vehicle even if there is a total loss of
pressure in one or more tires. The affected tire
must not show any clearly visible damage.
You can recognise run-flat tires by the marking
which appears on the tire side wall. You will
find this marking next to the tire size designa-
tion, the load-bearing capacity and the speed
index.
Run-flat tires may only be used in conjunction
with an activated tire pressure loss warning
system or tire pressure monitor.
Pressure loss warning message
If a pressure loss warning message appears in
the vehicle information display:
•Observe the instructions in the display mes-
sages.
•Check the tire for damage.
•If driving on, observe the following notes.
The driving distance possible in run-flat mode is
approximately 50 miles (80 km) when the ve-
hicle is partially laden and approximately 20
miles (30 km) when the vehicle is fully laden.NIC2686
6-4In case of emergency

In addition to the vehicle load, the driving
distance possible depends upon:
•Vehicle speed.
•Road condition.
•Outside temperature.
The driving distance possible in run-flat mode
may be reduced by extreme driving conditions/
maneuvers, or it can be increased through a
moderate style of driving.
The driving distance possible in run-flat mode is
counted from the moment the tire pressure loss
warning appears in the vehicle information dis-
play.
You must not exceed a maximum speed of 50
MPH (80 km/h).
When replacing one or all tires, observe the
following specifications for your vehicle’s tires:
•Size
•Type
•Run-flat mark
If a tire has gone flat and cannot be replaced
with a run flat tire, a standard tire may be used
as a temporary measure. Make sure that you
use the proper size and type (summer or winter
tire).
WARNING
Do not exceed the stated maximum speed.
Avoid abrupt steering and driving maneuvers,
and driving over obstacles (curbs, pot holes,
off road). This applies in particular to a laden
vehicle.
Stop driving in emergency mode if:
•You hear banging noises.
•The vehicle starts to shake.
•You see smoke and smell rubber.
•VDC is intervening constantly.
•There are tears in the sidewalls of the tire.
After driving in emergency mode, have the
wheel rims checked with regard to their further
use. It is recommended you visit an INFINITI
retailer for this service. The faulty tire must be
replaced.
REMOVING AND FITTING WHEELS
NOTE
A spare wheel is not provided with your vehicle.
Blocking the wheels
WARNING
Make sure to block the appropriate wheel to
prevent the vehicle from moving, which may
cause personal injury.
Place suitable blocks
1in front of and behind
the wheel diagonally opposite the flat tire
Ato
prevent the vehicle from moving when it is on
the jack.
MCE0001DZ
In case of emergency6-5

•Before taking a long trip, or whenever you
heavily load your vehicle, use a tire pres-
sure gauge to ensure that the tire pressures
are at the specified level.
•For additional information regarding tires,
refer to “Important Tire Safety Information”
(US) or “Tire Safety Information” (Canada)
in the Warranty Information Booklet.
Tire and Loading Information label
1Seating capacity: The maximum number of
occupants that can be seated in the vehicle.
2Vehicle load limit: See Vehicle loading
information in the10. Technical informa-
tion section.
3Original size: The size of the tires originally
installed on the vehicle at the factory.
4Cold tire pressure: Inflate the tires to this
pressure when the tires are cold. Tires are
considered COLD after the vehicle has been
parked for 3 or more hours, or driven less
than 1 mile (1.6 km) at moderate speeds.
The recommended cold tire inflation is set
by the manufacturer to provide the best
balance of tire wear, vehicle handling,
driveability, tire noise, etc., up to the vehi-
cle’s GVWR.
5Tire size — see Tire labelinglater in this
section.
6Spare tire size or compact spare tire size (if
so equipped).
SDI2703
Do-it-yourself8-27

TIRE INFLATION PRESSURE
Checking tire pressure
1. Remove the valve stem cap from the tire.
2. Press the pressure gauge squarely onto thevalve stem. Do not press too hard or force
the valve stem sideways, or air will escape. If
the hissing sound of air escaping from the
tire is heard while checking the pressure,
reposition the gauge to eliminate this
leakage.
3. Remove the gauge.
4. Read the tire pressure on the gauge stem and compare it to the specification shown on
the Tire and Loading Information label.
5. Add air to the tire as needed. If too much air is added, press the core of the valve stem briefly with the tip of the gauge stem to
release pressure. Recheck the pressure and
add or release air as needed.
6. Install the valve stem cap.
7. Check the pressure of all other tires, includ- ing the spare.
Size Cold tire in- flation pres-
sure
Front original
tire 235/50 R18
(2WD) 35 psi,
240kPa
235/50 R18
(4WD/AWD) 35 psi,
240kPa
235/45 R19
(2WD 32 psi,
220kPa
Rear original
tire 235/50 R18
(2WD) 32 psi,
220kPa
235/50 R18
(4WD/AWD) 35 psi,
240kPa
235/45 R19
(2WD 32 psi,
220kPa
Spare tire NONE
TIRE LABELING
Federal law requires tire manufacturers to place
standardized information on the sidewall of all
tires. This information identifies and describes
the fundamental 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.
SDI1949ZSDI1575ZExample
8-28Do-it-yourself
** Click HERE to see "Owner's Manual Supplement" **

1Tire size (example: P215/60R16 94H)
1 P: The “P” indicates the tire is designed for passenger vehicles. (Not all tires have this
information.)
2 Three-digit number (215): This number gives the width in millimeters of the tire from
sidewall edge to sidewall 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
because it is not required by law. 7 H: Tire speed rating. You should not drive the
vehicle faster than the tire speed rating.
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 identification mark
3 Two-digit code: Tire size
4 Three-digit code: Tire type code (Optional)
5 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 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 pressure
This number is the greatest amount of air
pressure that should be put in the tire. Do
not exceed the maximum permissible infla-
tion 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.
SDI1606ZExampleNDI1623Example
Do-it-yourself8-29

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 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.
TYPES OF TIRES
WARNING
•When changing or replacing tires, be sure
all four tires are of the same type (i.e, sum-
mer, 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
they may not match the potential maximum
vehicle speed. Never exceed the maximum
speed rating of the tire.
•Always use tires of the same type, size,
brand, construction and tread pattern on allfour wheels. Failure to do so may result in a
circumference difference between tires on
the front and rear axles which can cause the
Vehicle Dynamic Control (VDC) system to
malfunction resulting in personal injury or
death, excessive tire wear and may damage
the transmission, transfer case and differ-
ential gears.
•For additional information regarding tires,
refer to “Important Tire Safety Information”
(US) or “Tire Safety Information“ (Canada)
in the Warranty Information Booklet.
CAUTION
ONLY use spare tires specified for the 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. It is recommended that you visit an
INFINITI retailer for this service.
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 on the tire sidewall. 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 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 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.
8-30Do-it-yourself

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.
Four-Wheel Drive (4WD) models
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. It is recommended that you visit an
INFINITI retailer.
TIRE CHAINS
CAUTION
Tire chains/cables should not be installed on
235/45 R19 or 235/50 R18 size tires. Installa-
tion of the tire chains/cables on 235/45 R19 or
235/50 R18 size tires will cause damage to the
vehicle. If you plan to use tire chains/cables,
you should install 215/60 R17 size tires on your
vehicle.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 that they are of proper size for the
tires on your vehicle and are installed according
to the chain manufacturer’s instructions.
Use chain tensioners when recommended by
the tire chain manufacturer to ensure a tight fit.
Loose end links of the tire chains must be
secured or removed to prevent the possibility of
whipping action damage to the fenders or un-
derbody. If possible, avoid fully loading your
vehicle when using tire chains. In addition,
drive at a reduced speed. Otherwise, your ve-
hicle may be damaged and/or vehicle handling
and performance may be adversely affected.
Tire chains must be installed only on the front
wheels and not on the rear wheels.
Never install tire chains on a T-type spare tire
(TEMPORARY USE ONLY).
Do not drive with tire chains on paved roads
which are clear of snow. Driving with chains in
such conditions can cause damage to the vari-
ous mechanisms of the vehicle due to some
overstress.
1: Wear indicator
2: 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 should be
replaced immediately.
•The original tires have a built-in tread wear
indicator. When the wear indicator is vis-
ible, the tire should be replaced.
•Tires degrade with age and use. Have tires,
including the spare, over 6 years old
checked by a qualified technician because
SDI1663Z
Do-it-yourself8-31

some tire damage may not be obvious. Re-
place 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, it is recommended
that you visit an INFINITI retailer for this
service.
•For additional information regarding tires,
refer to “Important Tire Safety Information”
(US) or “Tire Safety Information” (Canada)
in the Warranty Information Booklet.
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 should be replaced immedi-
ately.
The original tires have a built-in tread wear
indicator. When the wear indicator is visible,
the tire should be replaced.
Improper servicing of a tire may result in seri-
ous personal injury. If it is necessary to repair a
tire, it is recommended you contact an INFINITI
retailer.
TIRE ROTATION
INFINITI recommends rotating the tires every
5,000 miles (8,000 km).
For additional information on tire replacing
procedures, refer to Flat tirein the6. In case
of emergency section.As soon as possible,
tighten the wheel nuts to the specified torque
with a torque wrench.
Wheel nut tightening torque: 96 ft-lb (130 N·m)
The wheel nuts must be kept tightened to speci-
fications at all times. It is recommended that
wheel nuts be tightened to specification at each
tire rotation interval.
WARNING
•After rotating the tires, check and adjust the
tire pressure.
•Do not include the spare tire in the tire rota-
tion.
•For additional information regarding tires,
refer to Important Tire Safety Information
(US) or Tire Safety Information in the War-
ranty Information Booklet.
REPLACING WHEELS AND TIRES
WARNING
Do not install a deformed wheel or tire even if it
has been repaired. Such wheels or tires could
have structural damage and could fail without
warning.
When replacing a tire, use the same size, speed
rating and load carrying capacity as originally
equipped. (See Wheels and Tires in the
9. Maintenance and Schedules section for
recommended types and sizes of tires and
wheels.)
If the wheels are changed for any reason,
always replace with wheels which have the
same offset dimension. Wheels of a different
offset could cause early tire wear, possibly
degraded 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.
8-32Do-it-yourself