2018 LEXUS NX300h wheel size

3456-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manu-
al_USA_OM78212U 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.338, 345)  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

3737-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_OM78212U 7
When trouble arises WARNING●
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.

406 8-1. Specifications
LEXUS NX300h Owners Manu-
al_USA_OM78212U 
Type A

Type BTires and wheels Tire size 225/65R17 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 permitted
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 size 17 × 7 J
Wheel nut torque 76 ft•lbf (103 N•m, 10.5 kgf•m)
Tire size 225/60R18 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 permitted
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 size 18 × 7 1/2 J
Wheel nut torque 76 ft•lbf (103 N•m, 10.5 kgf•m)

4078-1. Specifications
LEXUS NX300h Owners Manu-
al_USA_OM78212U 8
Vehicle specifications 
Compact spare tire
A: Wedge base bulbs (clear)
B: Wedge base bulbs (amber) *
:If equippedTire size T165/80D17 104M
Spare tire inflation pressure
(Recommended cold tire inflation
pressure) 60 psi (420 kPa, 4.2 kgf/cm 2
or bar)
Wheel size 17 × 4 T
Wheel nut torque 76 ft•lbf (103 N•m, 10.5 kgf•m)
Light bulbs Light bulbs Bulb No. W Type
Exterior Front side marker lights (bulb
type) W5W 5 A
Front turn signal lights (bulb
type)* 585
(WY21W) 21 B
Interior Vanity lights ⎯ 8 A

412 8-1. Specifications
LEXUS NX300h Owners Manu-
al_USA_OM78212U 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 dimensions Section width
Tire height
Wheel diameter
Bead
Sidewall
Shoulder
Tread
Belt
Inner liner
Reinforcing rubber
Carcass
Rim lines
Bead wires
Chafer
This information has been prepared in
accordance with regulations issued by
the National Highway Traffic Safety
Administration of the U.S. Department
of Transportation.
It provides the purchasers and/or pro-
spective purchasers of Lexus vehicles
with information on uniform tire quality Tire size
A
B
C
D
E
F
G Tire section names
Uniform Tire Quality Grading A
B
C
A
B
C
D
E
F
G
H
I
J
K

414 8-1. Specifications
LEXUS NX300h Owners Manu-
al_USA_OM78212U Glossary of tire terminology Tire related
term Meaning
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
pressure The maximum cold inflated
pressure to which a tire may
be inflated, shown on the
sidewall of the tire
Recom-
mended
inflation
pressure Cold 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
weight 150 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-
ignation Rim diameter and widthTire related
term Meaning

456 Alphabetical Index
LEXUS NX300h Owners Manu-
al_USA_OM78212U Steering wheel
Adjustment......................................................139
Heated steering wheel............................ 275
Power easy access system .....................134
Stop lights
Replacing light bulbs................................ 353
Storage feature ..............................................281
Storage precautions.....................................281
Stuck
If the vehicle becomes stuck................ 397
Sun visors ........................................................288
Sunglass holder ............................................ 283
Switch
ASC (Active Sound Control) dial ....... 181
Automatic High Beam switch .............. 186
Brake hold switch....................................... 180
BSM (Blind Spot Monitor) main switch
........................................................................... 241
Cruise control switch ................................ 217
Door lock switch......................................... 108
Driving mode select switch .................. 249
Driving position memory switches .....134
Emergency flashers switch .................. 358
EV drive mode switch ................................171
Fog light switch ............................................ 189
Garage door opener switches ..........298
Heated steering wheel............................ 275
HUD (Head-up display) switches ....... 90
Ignition switch............................................... 168
Intuitive parking assist switch................227
LDA switch .....................................................210
Light switches ............................................... 183
Meter control switches ..............................85
Moon roof switches ...................................146
Outside rear view mirror switches ..... 142
Paddle shift switches .................................. 175
Parking brake switch ................................. 177
PCS switch ...................................................205
Power back door opener and closer
switch............................................................... 113
Power switch ................................................ 168
Power window switch ............................... 144 Rear window and outside rear view mir-
ror defoggers switch ............................269
Rear window wiper and washer switch
........................................................................... 194
Seat heater switches................................. 275
“SOS” button............................................... 306
Tire pressure warning reset switch.....341
Vehicle-to-vehicle distance button .... 217
VSC off switch ............................................. 251
Window lock switch.................................. 145
Windshield wipers and washer switch
........................................................................... 189 T
Tachometer........................................................79
Tail lights
Light switch .................................................... 183
Replacing light bulbs ................................353
Theft deterrent system
Alarm..................................................................... 71
Immobilizer system ......................................69
Tire inflation pressure
Maintenance data ..................................... 406
Warning light ...............................................370
Tire information ............................................. 410
Glossary ...........................................................414
Size ......................................................................412
Tire identification number......................... 411
Uniform Tire Quality Grading ..............412
Tire pressure warning system
Function ......................................................... 338
Initializing..........................................................341
Installing tire pres sure warning valves
and transmitters...................................... 340
Registering ID codes ...............................343
Warning light ...............................................370
Tires................................................................... 336
Chains ............................................................ 258
Checking .......................................................336
Glossary ...........................................................414
If you have a flat tire .................................. 377
Inflation pressure ........................... 343, 406

458 Alphabetical Index
LEXUS NX300h Owners Manu-
al_USA_OM78212U ......................................................................... 257
Switch .................................................... 194, 374
Washing and waxing....................................314
Weights
Cargo capacity................................155, 400
Load limits ......................................... 158, 400
Weights ......................................................... 400
Wheels ............................................................. 345
Replacing wheels....................................... 345
Size....................................................................406
Window glasses .............................................144
Window lock switch .....................................145
Windows
Power windows............................................ 144
Rear window defogger .......................... 269
Washer .................................................. 189, 194
Windshield wiper de-ice r ........................ 273
Windshield wipers
Intermittent windshield wipers ............. 189
Rain-sensing windshield wipers............ 191
Winter driving tips....................................... 257
Wireless charger ......................................... 290
Wireless remote control key ................... 104
Battery-saving function ............................ 123
Locking/Unlocking ................................... 104
Panic mode.................................................... 104
Replacing the battery............................... 347 For information regarding the
equipment listed below, refer to
the “NAVIGATION AND MULTI-
MEDIA SYSTEM OWNER’S
MANUAL”.
· Audio/visual system
· Navigation system
· Lexus parking assist monitor
· Panoramic view monitor
· Lexus Enform