tire size LEXUS LX570 2018 User Guide

499
LX570_OM_OM60Q78U_(U) 6-3. Do-it-yourself maintenance
6
Maintenance and care
Wheels When replacing wheels, care should be ta ken to ensure that they are equivalent
to those removed in load capacity, 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 straightened ●
Use only Lexus wheel nuts and wrenches designed for use with your alumi-
num wheels. ●
When rotating, repairing or changing your tires, check that the wheel nuts are
still tight after driving 1000 miles (1600 km). ●
Be careful not to damage the aluminum wheels when using tire chains. ●
Use only Lexus genuine balance weights or equivalent and a plastic or rubber
hammer when balancing your wheels. ■
When replacing wheels
The wheels of your vehicle are equipped with tire pressure warning valves and transmit-
ters 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 pressure warning
valves and transmitters must be installed. ( → P. 487)If a wheel is bent, cracked or heavil y corroded, it should be replaced.
Otherwise, the tire may separate from the wheel or cause loss of handling
control.
Wheel selection
Aluminum wheel precautions

500
LX570_OM_OM60Q78U_(U) 6-3. Do-it-yourself maintenance
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 accident, 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 du ring driving, possibly causing an accident.
NOTICE ■
Replacing tire pressure warn ing valves and transmitters●
Because tire repair or replacement may affe ct the tire pressure warning valves and
transmitters, make sure to have tires serviced by your Lexus dealer or other qualified
service shop. In addition, ma ke sure to purchase your tire pressure warning valves
and transmitters at your Lexus dealer. ●
Ensure that only genuine Lexus wh eels are used on your vehicle.
Tire pressure warning valves and transmitte rs may not work properly with non-genu-
ine wheels.

5277-2. Steps to take in an emergency
LX570_OM_OM60Q78U_(U) 7
When trouble arises WARNING ■
Maintenance of the tires
Each tire, including the spare (if provided), should be checked monthly when cold and
inflated to the inflation pressure recomm ended by the vehicle manufacturer on the
vehicle placard or tire inflation pressure label (tire and load information label). (If your
vehicle has tires of a different size than the size indicated on the vehicle placard or tire
inflation pressure label [tire and load in formation label], you should determine the
proper tire inflation pressure for those tires.)
As an added safety feature, your vehicle ha s been equipped with a tire pressure moni-
toring system (TPMS-tire pressure warning system) that illuminates a low tire pressure
telltale (tire pressure warning light) when on e or more of your tires is significantly
under-inflated. Accordingly, when the low ti re pressure telltale (tire pressure warning
light) illuminates, you should st op and check your tires as soon as possible, and inflate
them to the proper pressure. Driving on a si gnificantly under-inflat ed tire causes the
tire to overheat and can lead to tire failure . Under-inflation also reduces fuel efficiency
and tire tread life, and may affect the vehicle’s handling and stopping ability.
Please note that the TPMS (tire pressure wa rning system) is not a substitute for proper
tire maintenance, and it is th e driver’s responsibility to ma intain correct tire pressure,
even if under-inflation has not reached the le vel to trigger illumina tion of the TPMS low
tire pressure telltale (tir e pressure warning light).
Your vehicle has also been equipped with a TPMS (tire pressure warning system) mal-
function indicator to indicate when the system is not operating properly. The TPMS
(tire pressure warning system) malfunction indi cator is combined with the low tire pres-
sure telltale (tire pressure warning light). When the system detects a malfunction, the
telltale will flash for approximately one mi nute and then remain continuously illumi-
nated. This sequence will cont inue upon subsequent vehicl e start-ups as long as the
malfunction exists. When the malfunction in dicator is illuminated, the system may not
be able to detect or signal low tire pressure as intended.
TPMS (tire pressure warning system) malfun ctions 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 functioning 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 pressu re warning system) to continue to function
properly.
NOTICE ■
To ensure the tire pressure warning system operates properly
Do not install tires with different specificatio ns or makers, as the tire pressure warning
system may not operate properly.

LX570_OM_OM60Q78U_(U) 5658-1. Specifications
8
Vehicle specifications 
20-inch tires 
21-inch tiresSuspension Fluid type Suspension fluid AHC
Tires and wheels Tire size 285/50R20 112V
Tire inflation pressure
(Recommended cold tire
inflation pressure) Normal driving
Front:
33 psi (230 kPa, 2.3 kgf/cm 2
or bar)
Rear:
33 psi (230 kPa, 2.3 kgf/cm 2
or bar)
Spare:
33 psi (230 kPa, 2.3 kgf/cm 2
or bar)
Trailer towing
Add 2 psi (10 kPa, 0.1 kgf/cm 2
or bar) to the rear
tires.
Wheel size 20 × 8 1/2J
Wheel nut torque 97 ft•lbf (131 N•m, 13.4 kgf•m)
Tire size 275/50R21 113V XL
Tire inflation pressure
(Recommended cold tire
inflation pressure) Normal driving
Front:
33 psi (230 kPa, 2.3 kgf/cm 2
or bar)
Rear:
33 psi (230 kPa, 2.3 kgf/cm 2
or bar)
Spare:
33 psi (230 kPa, 2.3 kgf/cm 2
or bar)
Trailer towing
Add 6 psi (40 kPa, 0.4 kgf/cm 2
or bar) to the
rear tires.
Wheel size 21 X 8 1/2J
Wheel nut torque 97 ft•lbf (131 N•m, 13.4 kgf•m)

569
LX570_OM_OM60Q78U_(U) 8-1. Specifications
8
Vehicle specifications
Tire information
Tire size ( → P. 571)
DOT and Tire Identification Number (TIN) ( → P. 570)
Location of trea dwear indicators ( → P. 486)
Tire ply composition and materials Plies are layers of rubber-c oated parallel cords. Cords are the strands which form the
plies in a tire.
Radial tires or bias-ply tires A radial tire has “RADIAL” on the sidewall. A tire not marked “RADIAL” is a bias-ply
tire.
TUBELESS or TUBE TYPE A tubeless tire does not have a tube and air is directly put into the tire. A tube type tire
has a tube inside the tire and the tube maintains the air pressure.
Load limit at maximum cold tire inflation pressure ( → P. 575)
Maximum cold tire inflation pressure ( → P. 575)This means the pressure to which a tire may be inflated.
Uniform tire quality grading For details, see “Uniform Tire Quality Grading” that follows.
Summer tires or all season tires ( → P. 490)An all season tire has “M+S” on the side wall. A tire not marked “M+S” is a summer
tire.Typical tire symbols
1
2
3
4
5
6
7
8
9
10

570
LX570_OM_OM60Q78U_(U) 8-1. Specifications
DOT symbol
*Tire Identification Number (TIN)
Tire manufacturer’s identification mark
Tire size code
Manufacturer’s optional tire type code (3 or 4 letters)
Manufacturing week
Manufacturing year
Manufacturer’s code
* : The DOT symbol certifies that the tire co nforms to applicable Federal Motor Vehicle
Safety Standards.Typical DOT and Tire Identification Number (TIN) 
Type A 
Type B
1
2
3
4
5
6
7
8

LX570_OM_OM60Q78U_(U) 5718-1. Specifications
8
Vehicle specifications ■
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 diameterTire size 1
2
3
4
5
6
7
1
2
3

576
LX570_OM_OM60Q78U_(U) 8-1. Specifications
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 capacity) The rated cargo and luggage load plus 150 lb. (68 kg)
times the vehicle’s desi gnated seating capacity
Vehicle maximum load on
the tire The load on an individual tire that is determined by dis-
tributing 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 determined by dis-
tributing to each axle its sh are of curb weight, accessory
weight, and normal occupant weight (distributed in
accordance 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 an d that is shaped to fit the
rim
Bead separation A breakdown of the bond between components in the
bead
Bias ply tire A pneumatic tire in which the ply cords that extend to
the beads are laid at altern ate 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 th e 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 materialTire related term Meaning

625Alphabetical index
LX570_OM_OM60Q78U_(U) Rear window wiper and
washer switch...................................235
Rear window and outside
rear view mirror defoggers
switch................................................... 405
Seat heater switches.......................... 415
Seat ventilator switches ................... 415
“SOS” button........................................452
Talk switch
* Telephone switches
*Tilt and telescopic steering
control switch .................................... 158
Tire pressure warning reset
switch................................................... 488
Vehicle-to-vehicle distance
button ................................................... 275
VSC OFF switch ...............................378
Window lock switch.......................... 165
Windshield wipers and
washer switch.....................................231
Wireless charger power
supply switch ....................................435
Tachometer ............................................... 88
Tail lights..................................................... 221
Light switch ............................................. 221
Replacing light bulbs ....................... 508
Talk switch
* Telephone switch
*Theft deterrent system
Alarm........................................................... 77
Immobilizer system .............................. 75 Tire inflation pressure......................... 565
Maintenance data..............................565
Warning light ....................................... 522
Tire information .................................... 569
Glossary................................................. 575
Size ............................................................. 571
Tire identification number ............. 570
Uniform Tire Quality Grading.... 573
Tire pressure warning system ..........487
Function .................................................. 487
Initializing ............................................... 487
Installing tire pressure warning
valves and transmitters................ 487
Registering ID codes ...................... 488
Tire pressure warning reset
switch .................................................. 488
Warning light ....................................... 522
Tires ........................................................... 486
Chains .....................................................383
Checking ...............................................486
If you have a flat tire .......................... 532
Inflation pressure................................ 495
Replacing ............................................... 532
Rotating tires ........................................486
Size ...........................................................565
Snow tires .............................................. 382
Spare tire................................... 532, 565
Tire pressure warning system ..... 487
Warning light ....................................... 522
Tools .......................................................... 532
Total load capacity............................... 558T
* : Refer to
the “NAVIGATION SYSTEM OWNER’S MANUAL”.

627Alphabetical index
LX570_OM_OM60Q78U_(U) Warning lights ....................................... 520
ABS.......................................................... 520
Automatic headlight leveling
system ................................................... 521
Brake system........................... 520, 523
Center differential lock.................... 522
Charging system............................... 520
Low fuel level ....................................... 522
Low speed four-wheel
drive ...................................................... 522
Malfunction indicator lamp .......... 520
Master warning light......................... 522
Open door ............................................ 522
Parking brake....................................... 522
PCS............................................................ 521
Power steering system.................... 522
Seat belt reminder light................... 522
Slip indicator .......................................... 521
SRS ........................................................... 520
Tire pressure ........................................ 522 Warning messages.............................. 528
Warning reflector holder.................. 428
Washer ........................................... 231, 235
Checking ...............................................485
Preparing and checking
before winter .................................... 382
Switch ............................................ 231, 235
Washing and waxing .......................... 458
Weights .................................................... 558
Wheels ..................................................... 499
Replacing wheels .............................. 532
Size ...........................................................565
Window glasses...................................... 165
Window lock switch.............................. 165
Windows
Power windows....................................165
Rear window defogger ..................405
Washer ......................................... 231, 235
Windshield wiper de-icer ................. 405
Windshield wipers ................................. 231
Winter driving tips ............................... 382
Wireless charger.................................. 435
Wireless remote control key.............. 110
Locking/Unlocking ............................. 110
Panic mode ............................................... 111
Replacing the battery ......................503
WMA disc
*
* : Refer to
the “NAVIGATION SYSTEM OWNER’S MANUAL”.