Lexus NX250 (2022 year). Manual in english — page 42
■
Tire dimensions
A
Section width
B
Tire height
C
Wheel diameter
Tire section names
A
Bead
B
Sidewall
C
Shoulder
D
Tread
E
Belt
F
Inner liner
G
Reinforcing rubber
H
Carcass
I
Rim lines
J
Bead wires
K
Chafer
Uniform Tire Quality Grading
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 prospective purchasers of Lexus vehicles with
information on uniform tire quality grading.
Your Lexus dealer will help answer any questions you may have as you read this
information.
■
DOT quality grades
All passenger vehicle tires must conform to Federal Safety Requirements in addi-
tion to these grades. Quality grades can be found where applicable on the tire
sidewall between tread shoulder and maximum section width.
For example: Treadwear 200 Traction AA Temperature A
10-1. Specifications
693
10
Vehicle specifications
■
Treadwear
The treadwear grade is a comparative rating based on the wear rate of the tire
when tested under controlled conditions on a specified government test course.
For example, a tire graded 150 would wear one and a half (1 - 1/2) times as well on
the government course as a tire graded 100.
The relative performance of tires depends upon the actual conditions of their use,
however, and may depart significantly from the norm due to variations in driving
habits, service practices and differences in road characteristics and climate.
■
Traction AA, A, B, C
The traction grades, from highest to lowest, are AA, A, B and C, and they represent
the tire’s ability to stop on wet pavement as measured under controlled conditions
on specified government test surfaces of asphalt and concrete.
A tire marked C may have poor traction performance.
Warning: The traction grade assigned to this tire is based on braking (straight
ahead) traction tests and does not include cornering (turning) traction.
■
Temperature A, B, C
The temperature grades are A (the highest), B, and C, representing the tire’s
resistance to the generation of heat and its ability to dissipate heat when tested
under controlled conditions on a specified indoor laboratory test wheel.
Sustained high temperature can cause the material of the tire to degenerate and
reduce tire life, and excessive temperature can lead to sudden tire failure.
Grade C corresponds to a level of performance which all passenger car tires must
meet under the Federal Motor Vehicle Safety Standard No. 109.
Grades B and A represent higher levels of performance on the laboratory test
wheel than the minimum required by law.
Warning: The temperature grades for this tire are established for a tire that is
properly inflated and not overloaded.
Excessive speed, underinflation, or excessive loading, either separately or in com-
bination, can cause heat buildup and possible tire failure.
10-1. Specifications
694
Glossary of tire terminology
Tire related term
Meaning
Cold tire inflation pressure
Tire pressure when the vehicle 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
Recommended inflation pressure
Cold tire inflation pressure recommended
by a manufacturer
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 vehicle with standard
equipment, including the maximum capaci-
ty of fuel, oil and coolant, and if so equip-
ped, air conditioning and additional weight
optional engine
Maximum loaded vehicle 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 occu-
pants specified 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
10-1. Specifications
695
10
Vehicle specifications
Tire related term
Meaning
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 considered in
curb weight or accessory weight, including
heavy duty brakes, ride levelers, roof rack,
heavy duty 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 diameter (Wheel diameter)
Nominal diameter of the bead seat
Rim size designation
Rim diameter and width
Rim type designation
The industry manufacturer's designation for
a rim by style or code
Rim width
Nominal distance between rim flanges
Vehicle capacity weight (Total load capaci-
ty)
The rated cargo and luggage load plus 150
lb. (68 kg) times the vehicle’s designated
seating capacity
Vehicle maximum load on the tire
The load on an individual tire that is deter-
mined by distributing to each axle its share
of the maximum loaded vehicle weight, and
dividing by two
Vehicle normal load on the tire
The load on an individual tire that is deter-
mined by distributing to each axle its share
of curb weight, accessory weight, and nor-
mal occupant weight (distributed in accord-
ance with Table 1
below), and dividing by
two
Weather side
The surface area of the rim not covered by
the inflated tire
Bead
The part of the tire that is made of steel
wires, wrapped or reinforced by ply cords
and that is shaped to fit the rim
Bead separation
A breakdown of the bond between compo-
nents in the bead
10-1. Specifications
696
Tire related term
Meaning
Bias ply tire
A pneumatic tire in which the ply cords that
extend to the beads are laid at alternate
angles substantially less than 90 degrees to
the centerline of the tread
Carcass
The tire structure, except tread and sidewall
rubber which, when inflated, bears the load
Chunking
The breaking away of pieces of the tread or
sidewall
Cord
The strands forming the plies in the tire
Cord separation
The parting of cords from adjacent rubber
compounds
Cracking
Any parting within the tread, sidewall, or
innerliner of the tire extending to cord ma-
terial
CT
A pneumatic tire with an inverted flange tire
and rim system in which the rim is designed
with rim flanges pointed radially inward and
the tire is designed to fit on the underside
of the rim in a manner that encloses the rim
flanges inside the air cavity of the tire
Extra load tire
A tire designed to operate at higher loads
and at higher inflation pressures than the
corresponding standard tire
Groove
The space between two adjacent tread ribs
Innerliner
The layer(s) forming the inside surface of
a tubeless tire that contains the inflating
medium within the tire
Innerliner separation
The parting of the innerliner from cord ma-
terial in the carcass
10-1. Specifications
697
10
Vehicle specifications
Tire related term
Meaning
Intended outboard sidewall
(a) The sidewall that contains a whitewall,
bears white lettering, or bears manufactur-
er, brand, and/or model name molding that
is higher or deeper than the same molding
on the other sidewall of the tire, or
(b) The outward facing sidewall of an asym-
metrical tire that has a particular side that
must always face outward when mounted
on a vehicle
Light truck (LT) tire
A tire designated by its manufacturer as
primarily intended for use on lightweight
trucks or multipurpose passenger vehicles
Load rating
The maximum load that a tire is rated to
carry for a given inflation pressure
Maximum load rating
The load rating for a tire at the maximum
permissible inflation pressure for that tire
Maximum permissible inflation pressure
The maximum cold inflation pressure to
which a tire may be inflated
Measuring rim
The rim on which a tire is fitted for physical
dimension requirements
Open splice
Any parting at any junction of tread, side-
wall, or innerliner that extends to cord ma-
terial
Outer diameter
The overall diameter of an inflated new tire
Overall width
The linear distance between the exteriors
of the sidewalls of an inflated tire, including
elevations due to labeling, decorations, or
protective bands or ribs
Passenger car tire
A tire intended for use on passenger
cars, multipurpose passenger vehicles, and
trucks, that have a gross vehicle weight rat-
ing (GVWR) of 10,000 lb. or less.
Ply
A layer of rubber-coated parallel cords
Ply separation
A parting of rubber compound between
adjacent plies
10-1. Specifications
698
Tire related term
Meaning
Pneumatic tire
A mechanical device made of rubber,
chemicals, fabric and steel or other materi-
als, that, when mounted on an automotive
wheel, provides the traction and contains
the gas or fluid that sustains the load
Radial ply tire
A pneumatic tire in which the ply cords that
extend to the beads are laid at substantially
90 degrees to the centerline of the tread
Reinforced tire
A tire designed to operate at higher loads
and at higher inflation pressures than the
corresponding standard tire
Section width
The linear distance between the exteriors
of the sidewalls of an inflated tire, excluding
elevations due to labeling, decoration, or
protective bands
Sidewall
That portion of a tire between the tread and
bead
Sidewall separation
The parting of the rubber compound from
the cord material in the sidewall
Snow tire
A tire that attains a traction index equal
to or greater than 110, compared to the
ASTM E-1136 Standard Reference Test Tire,
when using the snow traction test as descri-
bed in ASTM F-1805-00, Standard Test
Method for Single Wheel Driving Traction
in a Straight Line on Snow-and Ice-Cov-
ered Surfaces, and which is marked with
an Alpine Symbol (
) on at least one
sidewall
Test rim
The rim on which a tire is fitted for testing,
and may be any rim listed as appropriate for
use with that tire
Tread
That portion of a tire that comes into con-
tact with the road
Tread rib
A tread section running circumferentially
around a tire
10-1. Specifications
699
10
Vehicle specifications
Tire related term
Meaning
Tread separation
Pulling away of the tread from the tire car-
cass
Treadwear indicators (TWI)
The projections within the principal grooves
designed to give a visual indication of the
degrees of wear of the tread
Wheel-holding fixture
The fixture used to hold the wheel and tire
assembly securely during testing
(1)
Table 1—Occupant loading and distribution for vehicle normal load for various desig-
nated seating capacities
Designated seating capaci-
ty, Number of occupants
Vehicle normal load, Num-
ber of occupants
Occupant distribution in a
normally loaded vehicle
2 through 4
2
2 in front
5 through 10
3
2 in front, 1 in second seat
11 through 15
5
2 in front, 1 in second seat, 1
in third seat, 1 in fourth seat
16 through 20
7
2 in front, 2 in second seat,
2 in third seat, 1 in fourth
seat
10-1. Specifications
700
Customizable features
User customization function outline
Your vehicle includes a variety of electronic features that can be personalized to
suit your preferences. The settings of these features can be changed using the
center display or at your Lexus dealer.
WARNING
As the engine needs to be running during customization, ensure that the vehicle is
parked in a place with adequate ventilation. In a closed area such as a garage, exhaust
gases, including harmful carbon monoxide (CO), may collect and enter the vehicle.
Possibly leading to death or a serious health hazard.
NOTICE
While performing customization, make sure that the engine is running, in order to
prevent the battery from becoming discharged.
10-2. Customizable features
701
10
Vehicle specifications
Method to change settings
Changing using the center display
Stop the vehicle in a place where operations can be performed safely, engage the
parking brake, and change the shift position to P.
1
Select
on the center display.
2
Select [Vehicle customize] or [Driving assist].
3
Select the item to change the settings of from the list.
Various setting can be changed. Refer to the list of settings that can be changed for
details.
For functions that can be turned on/off, select
(ON)/
(OFF).
10-2. Customizable features
702
Customizable features
Some function settings are changed simultaneously with other functions being
customized. Contact your Lexus dealer for further details.
A
Settings that can be changed using the center display
B
Settings that can be changed by your Lexus dealer
Definition of symbols: O = Available, — = Not available
Gauges, meters and multi-information display
The language, units of measure, etc. of some items displayed on the meter or
multi-information display will be changed according to settings on the center
display. Refer to "MULTIMEDIA OWNER'S MANUAL".
Function
Default setting
Customized
setting
Meter display
type
Type 1
Type 2
O
—
Type 3
Eco Driving In-
dicator Light
On
Off
O
—
Rev indicator
5000 rpm
2000 - 6800
rpm
2000 - 6200
rpm
O
—
Off
Rev peak
On
Off
O
—
Suggestion
function
On
On (when the
vehicle is stop-
ped)
O
O
Off
Rear seat re-
minder func-
tion
On
Off
O
—
(1)
This setting changes in accordance with My Settings
(2)
F SPORT models
(3)
NX200/NX250
* :
If equipped
10-2. Customizable features
703
10
Vehicle specifications
(4)
NX350
(5)
The setting can be changed on [Notifications] of
.
Function
Default setting
Customized
setting
Display
On
Off
O
—
Display mode
Maximum
Normal
O
—
Minimum
(1)
This setting changes in accordance with My Settings
Steering wheel switches (vehicles with a head-up display)
Function
Default setting
Customized
setting
Right steering
wheel switch fa-
vorite func-
tions
Display control Custom
O
—
Left steering
wheel switch fa-
vorite func-
tions
Audio
Climate
O
—
Custom
Switch sensor
high sensitivity
mode (winter
glove mode)
Off
On
O
—
(1)
This setting changes in accordance with My Settings
Door lock
* :
If equipped
10-2. Customizable features
704
Function
Default setting
Customized
setting
Door lock
switch indicator
illumination time
30 seconds
60 seconds
—
O
600 seconds
1200 seconds
Inside door
opener switch
operation ad-
justment (door
opening func-
tion adjustment)
Short
Mid
—
O
Long
Multi-informa-
tion display/
buzzer opera-
tion when a
door opener
switch inside the
vehicle is oper-
ated
On
Off
—
O
Inside/outside
door opener
switch operat-
ing method
Unlatch while
Pushing switch
0.6 Seconds
—
O
Operating from
inside the cabin:
0.6 Seconds
Operating from
outside:
Unlatch while
Pushing switch
Operating from
inside the cabin:
Unlatch while
Pushing switch
Operating from
outside:
0.6 Seconds
10-2. Customizable features
705
10
Vehicle specifications
Function
Default setting
Customized
setting
Unlocking using
a mechanical
key
Driver’s door
unlocked in one
step, all doors
unlocked in two
step
All doors un-
locked in one
step
—
O
Shift position
linked door
locking func-
tion
On
Off
O
O
Automatic door
unlocking func-
tion
Shift position
linked door un-
locking opera-
tion
Off
O
O
Driver’s door
linked door un-
locking opera-
tion
(1)
This setting changes in accordance with My Settings
Power back door
Function
Default setting
Customized
setting
Back door auto-
matic open and
stop position
5
Stop at the de-
sired position
(height)
O
—
1 to 5
Power back
door operations
On
Off
O
—
Operation buz-
zer volume
3
1
O
—
2
Kick Sensor
On
Off
O
—
Kick operation
buzzer
On
Off
—
O
* :
If equipped
10-2. Customizable features
706
Function
Default setting
Customized
setting
The function
that validates
the
switch of the
wireless remote
control when
locking the door
On
Off
—
O
Close & lock
(walk away)
function
On
Off
—
O
Hands free
close & lock
(walk away)
function
Off
On
—
O
(1)
Configured by operating the
switch of the lower back door.
(2)
When the towing hitch is installed, the kick sensor does not work
Smart access system with push-button start and wireless remote control
Function
Default setting
Customized
setting
Operation buz-
zer volume
5
Off
O
O
1 to 7
Operation sig-
nal (Emergency
flashers)
On
Off
O
O
Time elapsed
before automat-
ic door lock
function is acti-
vated if door is
60 seconds
Off
O
O
30 seconds
* :
If equipped
10-2. Customizable features
707
10
Vehicle specifications
Function
Default setting
Customized
setting
not opened af-
ter being un-
locked
60 seconds
120 seconds
O
O
Open door
warning buzzer
On
Off
—
O
(1)
This setting changes in accordance with My Settings
(2)
If set to off, the off setting will be prioritized over the automatic door lock function time
setting set in My Settings.
Smart access system with push-button start
Function
Default setting
Customized
setting
Smart access
system with
push-button
start
On
Off
—
O
The doors that
are unlocked
using the smart
access system
with push-but-
ton start can be
selected
Driver’s door
All the doors
O
O
Number of con-
secutive door
lock operations
2 times
As many as de-
sired
—
O
Time elapsed
before unlock-
ing all the door
when gripping
and holding the
driver’s door
handle
2 seconds
Off
—
O
1.5 seconds
2.5 seconds
(1)
This setting changes in accordance with My Settings
* :
If equipped
10-2. Customizable features
708
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