tire size LEXUS RX350 2021 Owner's Manual

4538-1. Specifications
8
Vehicle specifications
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.366)
Maximum cold tire inflation pressure ( P.448)
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.366)
An all season tire has “M+S” on the sidewall. A tire not marked “M+S” is a summer tire.
“TEMPORARY USE ONLY”
A compact spare tire is identified by the phrase “TEMPORARY USE ONLY” molded on its
sidewall. This tire is designed for temporary emergency use only.
Type A
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
*: The DOT symbol certifies that the tire conforms to applicable Federal Motor
Vehicle Safety Standards.
Type B
DOT symbol
*
Tire Identification Number (TIN)
Tire manufacturer’s identification
mark
Manufacturer’s code
Manufacturing week
Manufacturing year
*: The DOT symbol certifies that the tire conforms to applicable Federal Motor
F
G
H
I
J
K
Typical DOT and Tire Identifica-
tion Number (TIN)
A
B
C
D
E
F
G
A
B
C
D
E
F

4548-1. Specifications
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
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
grading.
Tire size
A
B
C
D
E
F
G
A
Tire section names
Uniform Tire Quality Grading
B
C
A
B
C
D
E
F
G
H
I
J
K

4578-1. Specifications
8
Vehicle specifications
RimA metal support for a tire or a tire and tube assem-
bly upon which the tire beads are seated
Rim diameter (Wheel diameter)Nominal diameter of the bead seat
Rim size designationRim diameter and width
Rim type designationThe industry manufacturer’s designation for a rim
by style or code
Rim widthNominal 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 designated seating capacity
Vehicle maximum load on the tire
The load on an individual tire that is determined 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 ti re that is determined by
distributing to each axle its share of curb weight,
accessory weight, and normal occupant weight
(distributed in accor dance with Table 1
* below), and
dividing by two
Weather sideThe 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 separationA 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 alternate angles substan-
tially less than 90 degrees to the centerline of the
tread
CarcassThe tire structure, except tread and sidewall rubber
which, when inflated, bears the load
ChunkingThe breaking away of pieces of the tread or sidewall
CordThe strands forming the plies in the tire
Cord separationThe parting of cords from adjacent rubber com-
pounds
Tire related termMeaning

4748-3. Initialization
8-3.Initialization
*:If equipped
Items to initialize
The following items must be initialized for normal system operation after such
cases as the battery being reconnected, or maintenance being performed on
the vehicle:
List of items to initialize
ItemWhen to initializeReference
Message indicating
maintenance is
required (U.S.A. only)
• After the maintenance is performedP.350
Tire pressure warning
system
• When changing the tire inflation pres- sure by changing traveling speed
• When changing the tire size
• When rotating the tires
P.371
Oil maintenance• After the maintenance is performedP.361
PKSB (Parking Support
Brake)
*• After reconnecting or changing the batteryP.260
Power back door• After reconnecting or changing the batteryP.109

503Alphabetical Index
Rear window and outside rear view mir-ror defoggers switch ............................ 292
Seat heater switches ................................306
Seat ventilator switches ..........................306
“SOS” button .................................................. 60
Tilt and telescopic steering control switch ...........................................................................139
Tire pressure warning reset switch .... 371
Vehicle-to-vehicle distance switch ...227
VSC OFF switch ....................................... 276
Window lock switch ..................................146
Windshield wiper and washer switch194
Windshield wiper de-icer switch ...... 297
T
Tachometer........................................................ 77 Rev indicator ................................................... 78
Rev peak ........................................................... 79
Tail lights Light switch .................................................... 188
Replacing light bulbs............................... 385
The Secondary Collision Brake ............ 275
Theft deterrent system Alarm .................................................................. 68
Engine immobilizer system ..................... 66
Tire inflation pressure Maintenance data......................................448
Tire inflation pressu re display function
......................................................................... 367
Warning light ............................................... 407
Tire information ............................................ 452 Glossary.........................................................456
Size.................................................................... 454
Tire identification number ..................... 453
Uniform Tire Quality Grading............ 454
Tire pressure display .................................. 367
Tire pressure warning system Function .......................................................... 367
Initializing ......................................................... 371
Installing tire pressure warning valves and transmitters ...................................... 370
Registering ID codes ............................... 372 Warning light ...............................................407
Tires Chains .............................................................. 281
Checking ...................................................... 365
If you have a flat tire ................................... 416
Inflation pressure ........................................ 373
Information ....................................................452
Replacing ........................................................ 416
Rotating tires ................................................ 367
Size ................................................................... 448
Snow tires ..................................................... 280
Spare tire ......................................................... 416
Tire inflation pressure display function.......................................................................... 367
Tire pressure warning system ............. 367
Warning light ...............................................407
Tools.................................................................... 417
Top tether strap............................................... 57
Total load capacity ...................................... 442
Towing Dinghy towing ...............................................173
Emergency towing.................................... 397
Towing eyelet.............................................. 399
Trailer towing ................................................ 163
TRAC (Traction Control) ........................ 275
Traction Control (TRAC) ........................ 275
Trailer Sway Control.................................. 275
Trailer towing ..................................................163
Transmission Automatic transmission ........................... 178
Driving mode select switch .................... 271
M mode ............................................................. 181
Paddle shift switches ........................ 180, 181
Trip meters ........................................................ 80
Turn signal lights Replacing light bulbs ............................... 385
Turn signal lever .......................................... 182
Wattage ..........................................................449
U
USB charging ports.................................... 322

504Alphabetical Index
V
Vanity lights.................................................... 333Wattage.......................................................... 449
Vanity mirrors ............................................... 333
VDIM (Vehicle Dynami cs Integrated Man-
agement)...................................................... 275
Vehicle data recording . ...................................6
Vehicle Dynamics Integrated Manage- ment (VDIM).............................................. 275
Vehicle identification number ................ 443
Vehicle Stability Control (VSC) ............274
Ventilators (seat ventilators)................... 306
VSC (Vehicle Stabilit y Control) ............274
W
Warning buzzers
Approach warning.................................... 233
Brake Override System .........................405
Door lock........................................................ 100
Downshifting .........................................181, 182
Drive-Start Control ..................................405
Electric power steering ..........................405
Hands off steering wheel warning (LTA)......................................................................... 223
High coolant temperature ....................403
Intuitive parking assist.................. 249, 407
Low engine oil pressure.........................404
LTA (Lane Tracing As sist)216, 219, 407
Open door......................................................102
Open window ...............................................145
PKSA (Parking Support Alert) ........... 242
PKSB (Parking Support Brake) ........ 408
Pre-collision braking..................................210
RCTA (Rear Cross Traffic Alert) ...... 407
Seat belt ..........................................................406
Warning lights............................................... 403 ABS ..................................................................405
Brake hold operated indicator ...........409
Brake Override System .........................405
Brake system ...............................................403
Charging system .......................................404 Drive-Start Control.................................. 405
Electric power steering.......................... 405
High coolant temperature.................... 403
Intuitive parking assist OFF indicator
..........................................................................407
Low engine oil pressure........................ 404
Low fuel level .............................................. 406
LTA indicator ...............................................407
Malfunction indicator lamp .................. 404
Master warning light................................ 409
Parking brake indicator ......................... 409
PKSB OFF indicator ............................... 408
Pre-collision system................................. 408
RCTA OFF indicator ...............................407
Seat belt reminder light.......................... 406
Slip indicator ................................................ 408
SRS ................................................................... 404
Tire pressure ................................................407
Warning messages ....................................... 412
Washer Adding.............................................................364
Preparing and checking before winter......................................................................... 280
Switch................................................................ 194
Washing and waxing.................................. 344
Weight Cargo capacity .................................. 159, 162
Load limits .......................................................162
Weight............................................................. 442
Wheels ............................................................. 374 Size ................................................................... 448
Window lock switch .....................................146
Windows Power windows ............................................144
Rear window defogger........................... 294
Washer ............................................................ 194
Windshield wiper de-icer ........................ 299
Windshield wiper inserts .......................... 378
Windshield wipers Position..............................................................197
Rain-sensing windshield wipers .......... 194
Replacing a windshield wiper insert.378