2018 INFINITI Q70 tire type

8-36Do-it-yourself
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 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 origin-
ally 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 War-
ranty Information Booklet.
All season tires
INFINITI 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 tires
INFINITI specifies summer tires on some
models to provide superior performance on
dry roads. Summer tire performance is
substantially reduced in snow and ice. Sum-
mer 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 thesame 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 capabilities 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 accord-
ing to location. Check the local laws before
installing 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 sug-
gestions.
Use only SAE Class S chains. Class
“S” chains are used on vehicles with re-
stricted 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
accommodate 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
recommended by the tire chain manufac-
turer 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
damage to the various mechanisms of the
vehicle due to some overstress.
SDI1662
CHANGING WHEELS AND TIRES
Tire rotation
INFINITI recommends rotating the
tires every 5,000 miles (8,000 km).
(See “Flat tire” (P.6-3) for tire repla-
cing procedures.)
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 tigh-
tened to the specification at all times.
It is recommended that wheel nuts be
tightened to the specification at each
tire rotation interval.
WARNING
.
After rotating the tires, check
and adjust the tire pressure.
. Retighten the wheel nuts when
the vehicle 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 re-
garding tires, refer to “Impor-
tant Tire Safety Information”
(US) or “Tire Safety Informa-
tion” (Canada) in the Warranty
Information Booklet.
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8-38Do-it-yourself
SDI1663
Tire wear and damage
1.Wear indicator
2.Wear indicator location mark.
The locations are shown by
“
”, “TWI”, etc. depending on
tire types.
WARNING
. Tires should be periodically in-
spected for wear, cracking, bul-
ging or objects caught in the
tread. If excessive 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 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 personal injury.
. Improper service of the spare
tire may result in serious perso-
nal injury. If it is necessary to
repair the spare tire, it is re-
commended you visit an
INFINITI retailer for this ser-
vice.
. For additional information re-
garding tires, refer to “Impor-
tant Tire Safety Information”
(US) or “Tire Safety Informa-
tion” (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 “Speci-
fications” (P.10-11) 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, construc-
tion (bias, bias-belted or radial), or
tread patterns can adversely affect
the ride, braking, handling, ground
clearance, body-to-tire clearance,
tire chain clearance, speedometer
calibration, headlight aim and bum-
per height. Some of these effects may
lead to accidents and could result in
serious personal injury.
. For Two-Wheel Drive (2WD) models,
if your vehicle was originally
equipped with 4 tires that were the
same size and you are only replacing
2 of the 4 tires, install the new tires
on the rear axle. Placing new tires on
the front axle may cause loss of
vehicle control in some driving condi-
tions and cause an accident and
personal injury.

.If the wheels are changed for any
reason, always replace with wheels
which have the same off-set dimen-
sion. Wheels of a different off-set
could cause premature tire wear,
degrade vehicle handling character-
istics and/or interference with the
brake discs/drums. Such interference
can lead to decreased braking effi-
ciency and/or early brake pad/shoe
wear. See “Wheels and tires” (P.10-
12) for wheel off-set dimensions.
. Since the spare tire is not equipped
with the TPMS, 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. Have
your tires replaced and/or TPMS
system reset as soon as possible. It
is recommended you visit an INFINITI
retailer for these services.
. Replacing tires with those not origin-
ally specified by INFINITI could affect
the proper operation of the TPMS.
. The TPMS sensor may be damaged if
it is not handled correctly. Be careful
when handling the TPMS sensor.
. When replacing the TPMS sensor, the
ID registration may be required. It is recommended you visit an INFINITI
retailer for ID registration.
. Do not use a valve stem cap that is
not specified by INFINITI. The valve
stem cap may become stuck.
. Be sure that the valve stem caps are
correctly fitted. Otherwise the valve
may be clogged up with dirt and
cause a malfunction or loss of pres-
sure.
. 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 recom-
mended.
. For additional information regarding
tires, refer to “Important Tire Safety
Information” (US) or “Tire Safety
Information” (Canada) in the War-
ranty Information Booklet.Intelligent All-Wheel Drive (AWD)
models
CAUTION
.Always use tires of the same type,
size, brand, construction (bias, bias-
belted or radial), and tread pattern
on all four wheels. Failure to do so
may result in a circumference differ-
ence between tires on the front and
rear axles which will cause excessive
tire wear and may damage the trans-
mission, transfer case and differential
gears.
. ONLY use spare tires specified for
the Intelligent 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 necessary. It is recommended
you visit an INFINITI retailer for this service.
Wheel balance
Unbalanced wheels may affect vehicle hand-
ling and tire life. Even with regular use,
wheels can get out of balance. Therefore,
Do-it-yourself8-39

8-40Do-it-yourself
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” (P.7-2) for details
about care of the wheels.
Spare tire (TEMPORARY USE
ONLY (T-type) spare tire)
Since the spare tire is not equipped with the
TPMS, when a spare tire is mounted (TEM-
PORARY USE ONLY or conventional), the
TPMS will not function.
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 possi-
ble tire or differential damage.
. Drive carefully while the TEMPOR-
ARY 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 pressure for stan-
dard tires, as indicated on the Tire
and Loading Information label. For
Tire and Loading Information label
location, see “Tire and loading infor-
mation label” (P.10-16).
. 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 TEM-
PORARY 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 re-
duced. 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.

10-12Technical and consumer information
WHEELS AND TIRES
Road wheel
TypeSize Offset in (mm)
Conventional 18 × 8J
1.69 (43)
20 × 9J 1.69 (43)
Spare 17 × 4T
18 × 4T 1.18 (30)
0 (0)
Tire
Type
Size Pressure PSI (kPa) [Cold]
Conventional P245/50R18
33 (230)
245/40R20
Spare (T-type) T165/80D17
T155/80D18 60 (420)

11-6
RecordersEvent data .................................................... 10-25
Registering in another country ..................... 10-14
Remote keyless entry system .......................... 3-14
Reporting safety defects ................................ 10-24
Rise-up and build-up ........................................ 5-124
Roadside assistance program ............................. 6-2
Rollover ..................................................................... 5-7
Roof Moonroof ......................................................... 2-54
S
SafetyChild seat belts ............................................... 1-17
Reporting safety defects .......................... 10-24
Seat adjustment Front power seat adjustment ....................... 1-3
Front seats ......................................................... 1-3
Seat belt(s) Child safety ..................................................... 1-17
Infants ............................................................... 1-17
Injured persons ............................................... 1-12
Larger children ............................................... 1-18
Precautions on seat belt usage ................. 1-10
Pre-crash seat belts with
comfort function ............................................ 1-12
Pregnant women ........................................... 1-12
Seat belt cleaning ............................................. 7-6
Seat belt extenders ....................................... 1-16
Seat belt maintenance ................................. 1-16
Seat belt warning light and chime ............ 2-15 Seat belts ......................................................... 1-10
Seat belts with pretensioners .................... 1-50
Shoulder belt height adjustment ............... 1-15
Small children .................................................. 1-18
Three-point type ............................................ 1-13
Seat(s) Climate controlled seats .............................. 2-43
Driver-side memory ...................................... 3-28
Heated seats ................................................... 2-41
Seats .................................................................... 1-2
Security system Vehicle security system ................................ 2-29
Security system (INFINITI Vehicle
Immobilizer System) Engine start ..................................................... 2-31
Servicing air conditioner (See automatic
climate control) .................................................... 4-32
Servicing climate control ................................... 4-37
Shift lever
Shift lock release ........................................... 5-18
Shift lock release, Transmission ...................... 5-18
Shifting
Automatic transmission ............................... 5-15
Shoulder belt height adjustment ...................... 1-15
SNOW mode ......................................................... 5-20
Spare tire ............................................................. 10-12
Spark plugs ............................................................ 8-19
Speedometer ............................................................ 2-7
SPORT mode ........................................................ 5-20
Standard maintenance .......................................... 9-7
STANDARD mode ............................................... 5-20 Starting
Before starting the engine .......................... 5-13
Jump starting .................................................. 8-17
Precautions when starting and driving ..... 5-4
Push starting ................................................... 6-11
Starting the engine ....................................... 5-14
Status light, Front passenger air bag ............ 1-46
Steering Heated steering wheel ................................ 2-40
Power steering fluid ..................................... 8-14
Power steering system ............................. 5-120
Steering lock release malfunction
indicator (if so equipped) ............................. 2-22
Tilt/telescopic steering ................................ 3-24
Steering lock (if so equipped) ............................ 5-11
Storage ................................................................... 2-47
Storage box ........................................................... 2-50
Sun visors ............................................................... 3-25
Sunglasses holder ................................................ 2-48
Sunshade (rear) .................................................... 2-55
Supplemental air bag warning labels .............. 1-51
Supplemental air bag warning light .... 1-52, 2-16
Supplemental restraint system ........................ 1-38 Precautions on supplemental
restraint system ............................................. 1-38
Switch Autolight switch ............................................. 2-35
Fog light switch ............................................. 2-39
Hazard warning flasher switch .................... 6-2
Headlight switch ............................................ 2-34
Ignition switch ................................................ 5-15

Power door lock switch ................................. 3-5
Rear window and outside mirror
defroster switch ............................................. 2-34
Turn signal switch ......................................... 2-39
Vehicle Dynamic Control (VDC)
off switch ........................................................ 2-44
Warning systems switch ............................ 2-44
T
Tachometer ............................................................. 2-8
Temperature gaugeEngine coolant temperature gauge ............ 2-8
Theft (INFINITI Vehicle Immobilizer System) Engine start ..................................................... 2-31
Three-way catalyst ................................................ 5-5
Tilt/telescopic steering ...................................... 3-24
“TIMER” indicator ............................................... 2-23
Tire
Tire replacement indicator .......................... 2-25
Tire rotation .................................................... 8-37
Tire pressure
Low tire pressure warning light ................ 2-14
Tires Flat tire ............................................................... 6-3
Low tire pressure
warning system ........................... 5-5, 6-3, 8-30
Spare tire ........................................................ 8-40
Tire and Loading
information label ............................. 8-32, 10-16
Tire chains ........................................................ 8-36
Tire dressing ...................................................... 7-4 Tire pressure .................................................. 8-30
Tire Pressure Monitoring
System (TPMS) ........................... 5-5, 6-3, 8-30
Types of tires .................................................. 8-36
Uniform tire quality grading .................... 10-22
Wheel/tire size ............................................ 10-12
Wheels and tires ........................................... 8-30
Towing Flat towing ................................................... 10-22
Tow truck towing .......................................... 6-13
Towing a trailer ........................................... 10-22
TPMS
Tire Pressure
Monitoring System .................... 5-5, 6-3, 8-30
Trailer towing .................................................... 10-22
Transceiver
HomeLink
®Universal Transceiver ........... 2-60
Transmission
Automatic Transmission Fluid (ATF) ....... 8-13
Driving with automatic transmission ....... 5-15
Transmission shift lever lock release ....... 5-18
Transmitter (See remote keyless
entry system) ........................................................ 3-14
Traveling or registering in
another country ................................................ 10-14
Trip computer ....................................................... 2-27
Trip odometer ....................................................... 2-27
Trunk
Interior trunk lid release .............................. 3-21
Light .................................................................. 2-59
Pass-through ..................................................... 1-5 Trunk hooks .................................................... 2-51
Trunk lid ........................................................... 3-18
Trunk lid release switch ............................... 3-18
Trunk open request switch ......................... 3-19
Trunk release power cancel switch ......... 3-20
Turn signal switch ............................................... 2-39
U
Underbody cleaning ............................................... 7-3
Uniform tire quality grading .......................... 10-22
V
Vanity mirror ......................................................... 3-28
Vanity mirror lights ............................................. 2-59
Variable voltage control system ..................... 8-18
Vehicle
Dimensions ................................................... 10-13
Recovery (freeing a stuck vehicle) ............ 6-15
Vehicle Dynamic Control (VDC)
off switch ........................................................ 2-44
Vehicle dynamic control
(VDC) system ................................................ 5-123
Vehicle dynamic control (VDC)
warning light ................................................... 2-16
Vehicle identification number (VIN) ............ 10-14
Vehicle information display .............................. 2-20
Vehicle loading information ........................... 10-18
Vehicle security system ...................................... 2-29
Ventilators ............................................................. 4-32
11-7