2021 LEXUS NX300h wheel size

3676-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manual_USA_M78578_en
6
Maintenance and care
When replacing wheels, care should
be taken to ensure that they are equiv-
alent to those removed in load capac-
ity, diameter, rim width and inset
*.
Replacement wheels are available at
your Lexus dealer.
*: Conventionally referred to as offset.
Lexus does not recommend using the
following:
 Wheels of different sizes or types
 Used wheels
 Bent wheels that have been straight-
ened
■When replacing wheels
The wheels of your vehicle are equipped
with tire pressure warning valves and trans-
mitters that allow the tire pressure warning
system to provide advance warning in the
event of a loss in tire inflation pressure.
Whenever wheels are replaced, tire pres-
sure warning valves an d transmitters must
be installed. ( P.359, 367) Use only Lexus wheel nuts and
wrenches designed for use with
your aluminum wheels.
 When rotating, repairing or chang-
ing your tires, check that the wheel
nuts are still tight after driving 1000
miles (1600 km).
 Be careful not to damage the alumi-
num wheels when using tire chains.
 Use only Lexus genuine balance
weights or equivalent and a plastic
or rubber hammer when balancing
your wheels.
Wheels
If a wheel is bent, cracked or heavily
corroded, it should be replaced.
Otherwise, the tire may separate
from the wheel or cause a loss of
handling control.
Wheel selection
WARNING
■When replacing wheels
●Do not use wheels that are a different
size from those recommended in the
Owner’s Manual, as this may result in a
loss of handling control.
●Never use an inner tube in a leaking
wheel which is designed for a tubeless
tire. Doing so may result in an acci-
dent, causing death or serious injury.
■Use of defective wheels prohibited
Do not use cracked or deformed wheels.
Doing so could cause the tire to leak air
during driving, possibly causing an acci-
dent.
NOTICE
■Replacing tire pressure warning
valves and transmitters
●Because tire repair or replacement
may affect the tire pressure warning
valves and transmitters, make sure to
have tires serviced by your Lexus
dealer or other qua lified service shop.
In addition, make sure to purchase
your tire pressure warning valves and
transmitters at your Lexus dealer.
●Ensure that only genuine Lexus wheels
are used on your vehicle.
Tire pressure warning valves and trans-
mitters may not work properly with
non-genuine wheels.
Aluminum wheel precautions

3977-2. Steps to take in an emergency
LEXUS NX300h Owners Manual_USA_M78578_en
7
When trouble arises
●Avoid abrupt maneuvering and brak-
ing. If the vehicle tires deteriorate, you
could lose control of the steering
wheel or the brakes.
■If a blowout or sudden air leakage
should occur
The tire pressure warning system may
not activate immediately.
■Maintenance of the tires
Each tire, including the spare (if pro-
vided), should be checked monthly when
cold and inflated to the inflation pressure
recommended by the vehicle manufac-
turer on the vehicle placard or tire infla-
tion pressure label (tire and load
information label). (I f your vehicle has
tires of a different size than the size indi-
cated on the vehicle placard or tire infla-
tion pressure label [tire and load
information label], yo u should determine
the proper tire infl ation pressure for
those tires.)
As an added safety feature, your vehicle
has been equipped with a tire pressure
monitoring system (TPMS-tire pressure
warning system) that illuminates a low
tire pressure telltale (tire pressure warn-
ing light) when one or more of your tires
is significantly under-inflated. Accord-
ingly, when the low tire pressure telltale
(tire pressure warnin g light) illuminates,
you should stop and check your tires as
soon as possible, and inflate them to the
proper pressure. Driving on a signifi-
cantly under-inflated tire causes the tire
to overheat and can lead to tire failure.
Under-inflation also reduces fuel effi-
ciency and tire tread life, and may affect
the vehicle’s handling and stopping abil-
ity.
Please note that the TPMS (tire pressure
warning system) is not a substitute for
proper tire maintenance, and it is the
driver’s responsibility to maintain correct
tire pressure, even if under-inflation has
not reached the level to trigger illumina-
tion of the TPMS low tire pressure telltale
(tire pressure warning light).
Your vehicle has also been equipped with
a TPMS (tire pressure warning system)
malfunction indicator to indicate when
the system is not operating properly. The
TPMS (tire pressure warning system)
malfunction indicator is combined with
the low tire pressure telltale (tire pres-
sure warning light) . When the system
detects a malfunction, the telltale will
flash for approximately one minute and
then remain continuously illuminated.
This sequence will continue upon subse-
quent vehicle start-ups as long as the
malfunction exists. When the malfunction
indicator is illuminated, the system may
not be able to detect or signal low tire
pressure as intended.
TPMS (tire pressure warning system)
malfunctions may occur for a variety of
reasons, including the installation of
replacement or alternate tires or wheels
on the vehicle that prevent the TPMS
(tire pressure warning system) from func-
tioning properly. Always check the
TPMS (tire pressure warning system)
malfunction telltale after replacing one
or more tires or wheels on your vehicle to
ensure that the replacement or alternate
tires and wheels allow the TPMS (tire
pressure warning system) to continue to
function properly.
NOTICE
■To ensure the tire pressure warning
system operates properly
Do not install tires with different specifi-
cations or makers, as the tire pressure
warning system may not operate prop-
erly.

4308-1. Specifications
LEXUS NX300h Owners Manual_USA_M78578_en
Type A
Type B
Tires and wheels
Tire size225/65R17 102H
Tire inflation pressure
(Recommended cold tire inflation
pressure)
Driving under normal conditions
Front
35 psi (240 kPa, 2.4 kgf/cm
2 or bar)
Rear
35 psi (240 kPa, 2.4 kgf/cm
2 or bar)
Driving at high speeds (above 100 mph [160
km/h]) (in countries where such speeds are permit-
ted by law)
Add 1 psi (10 kPa, 0.1 kgf/cm
2 or bar) to the front
and rear tires. Never exceed the maximum cold tire
inflation pressure indica ted on the tire sidewall.
Wheel size17  7 J
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)
Tire size225/60R18 100H
Tire inflation pressure
(Recommended cold tire inflation
pressure)
Driving under normal conditions
Front
32 psi (220 kPa, 2.2 kgf/cm
2 or bar)
Rear
32 psi (220 kPa, 2.2 kgf/cm
2 or bar)
Driving at high speeds (above 100 mph [160
km/h]) (in countries where such speeds are permit-
ted by law)
Add 9 psi (60 kPa, 0.6 kgf/cm
2 or bar) to the front
and rear tires. Never exceed the maximum cold tire
inflation pressure indica ted on the tire sidewall.
Wheel size18  7 1/2 J
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

4318-1. Specifications
LEXUS NX300h Owners Manual_USA_M78578_en
8
Vehicle specifications
Compact spare tire
A: Wedge base bulbs (clear)
B: Wedge base bulbs (amber)
*:If equipped
Tire sizeT165/80D17 104M
Spare tire inflation pressure
(Recommended cold tire inflation
pressure)
60 psi (420 kPa, 4.2 kgf/cm2 or bar)
Wheel size17  4 T
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)
Light bulbs
Light bulbsBulb No.WType
Exterior
Front side marker lights (bulb
type)W5W5A
Front turn signal lights (bulb
type)
*WY21W21B
InteriorVanity lights8A

4368-1. Specifications
LEXUS NX300h Owners Manual_USA_M78578_en
mark
Manufacturer’s code
Manufacturing week
Manufacturing year
*:The DOT symbol certifies that the tire
conforms to applicable Federal Motor
Vehicle Safety Standards.
■Typical tire size information
The illustration indicates typical tire
size.
Tire use
(P = Passenger car,
T = Temporary use)
Section width (millimeters)
Aspect ratio
(tire height to section width)
Tire construction code
(R = Radial, D = Diagonal)
Wheel diameter (inches)
Load index (2 digits or 3 digits)
Speed symbol (alphabet with one
letter)
■Tire dimensionsSection width
Tire height
Wheel diameter
Bead
Sidewall
Shoulder
Tread
Belt
Inner liner
Reinforcing rubber
Carcass
Rim lines
Bead wires
Tire size
D
E
F
A
B
C
D
E
F
G
Tire section names
A
B
C
A
B
C
D
E
F
G
H
I
J

4388-1. Specifications
LEXUS NX300h Owners Manual_USA_M78578_en
nation, can cause heat buildup and
possible tire failure.
Glossary of tire terminology
Tire related
termMeaning
Cold tire
inflation
pressure
Tire pressure when the vehi-
cle has been parked for
three hours or more, or has
not been driven more than 1
mile or 1.5 km under that
condition
Maximum
inflation
pressureThe maximum cold inflated
pressure to which a tire may
be inflated, shown on the
sidewall of the tire
Recom-
mended
inflation
pressureCold tire inflation pressure
recommended by a manu-
facturer
Accessory
weight
The combined weight (in
excess of those standard
items which may be
replaced) of transmission,
power steering, power
brakes, power windows,
power seats, radio and
heater, to the extent that
these items are available as
factory-installed equipment
(whether installed or not)
Curb weight
The weight of a motor vehi-
cle with standard equip-
ment, including the
maximum capacity of fuel,
oil and coolant, and if so
equipped, air conditioning
and additional weight
optional engine
Maximum
loaded vehi-
cle weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options
weight
Normal
occupant
weight150 lb. (68 kg) times the
number of occupants speci-
fied in the second column of
Table 1
* that follows
Occupant
distribution
Distribution of occupants in
a vehicle as specified in the
third column of Table 1
*
below
Production
options
weight
The combined weight of
installed regular production
options weighing over 5 lb.
(2.3 kg) in excess of the
standard items which they
replace, not previously con-
sidered in curb weight or
accessory weight, including
heavy duty brakes, ride lev-
elers, roof rack, heavy duty
12-volt battery, and special
trim
Rim
A metal support for a tire or
a tire and tube assembly
upon which the tire beads
are seated
Rim diame-
ter
(Wheel
diameter)
Nominal diameter of the
bead seat
Rim size des-
ignationRim diameter and width
Tire related termMeaning

480Alphabetical Index
LEXUS NX300h Owners Manual_USA_M78578_en
Switch
ASC (Active Sound Control) dial ..... 188
Automatic High Beam switch ...............193
Brake hold switch........................................187
BSM (Blind Spot Monitor) main switch......................................................................... 262
Cruise control switch .............................. 237
Door lock switch............................................112
Driving mode select switch .................. 270
Driving position memory switches .... 138
Emergency flashers switch .................. 380
EV drive mode switch ..............................178
Fog light switch .............................................196
Garage door opener switches .......... 322
Heated steering wheel............................ 299
HUD (Head-up display) switches ....... 95
Ignition switch................................................ 174
LDA switch ..................................................... 231
Light switches ............................................... 190
LTA switch .................................................... 223
Meter control switches .............................. 89
Moon roof switches .................................. 150
Outside rear view mirror switches .....146
Paddle shift switches ..................................182
Parking brake switch ................................ 184
Power back door opener and closer switch................................................................117
Power switch ................................................. 174
Power window switch .............................. 148
Rear window and outside rear view mir- ror defoggers switch ............................ 292
Rear window wiper and washer switch ...........................................................................201
Seat heater switches ................................ 299
“SOS” button .................................................. 60
Tire pressure warning reset switch .. 363
Vehicle-to-vehicle distance switch .. 237
VSC off switch ............................................ 273
Window lock switch ..................................149
Windshield wipers and washer switch ................................................................ 196, 201T
Tachometer....................................................... 84
Tail lights Light switch .................................................... 190
Replacing light bulbs ................................375
Theft deterrent system Alarm....................................................................77
Immobilizer system ...................................... 75
Tire inflation pressure Maintenance data ..................................... 430
Warning light ...............................................394
Tire information ............................................ 434 Glossary ........................................................ 438
Size ....................................................................436
Tire identification number......................435
Uniform Tire Quality Grading ............ 437
Tire pressure warning system Function ......................................................... 359
Initializing........................................................363
Installing tire pres sure warning valves
and transmitters.......................................362
Registering ID codes ...............................364
Warning light ...............................................394
Tires................................................................... 357 Chains ............................................................ 280
Checking .......................................................357
Glossary ........................................................ 438
If you have a flat tire ..................................402
Inflation pressure ........................... 365, 430
Replacing .......................................................402
Rotating tires ............................................... 358
Size ................................................................... 430
Snow tires ...................................................... 279
Spare tire ........................................... 402, 430
Tire identification number......................435
Tire pressure warning system ............ 359
Uniform Tire Quality Grading ............ 437
Warning light ...............................................394
Tools.................................................................. 402
Top tether strap............................................... 57
Total load capacity ...................................... 424