2019 LEXUS UX250H tire size

4228-1. Specifications
A: Wedge base bulbs (amber)
B: Wedge base bulbs (clear)
Tires and wheels
Tire size225/50RF18 95V
Tire inflation pressure
(Recommended cold tire inflation
pressure)Front: 33 psi (230 kPa, 2.3 kgf/cm2 or bar)
Rear: 33 psi (230 kPa, 2.3 kgf/cm
2 or bar)
Wheel size18  7 J
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)
Light bulbs
Light bulbsBulb No.WType
ExteriorFront turn signal lights (vehicles
with single-beam headlights)WY21W21A
InteriorVanity lights8B

4258-1. Specifications
8
Vehicle specifications
Tire size (P.426)
Run-flat tire (RFT) or standard tire ( P.399)
This vehicle can be equipped with either run-flat tires (RFT) or standard tires. A
mark is molded on the sidewall of the run-flat tire.
DOT and Tire Identification Number (TIN) ( P.426)
Location of treadwear indicators ( P.345)
Tire ply composition and materials
Plies are layers of rubber-coated 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.429)
Maximum cold tire inflation pressure ( P.429)
This means the pressure to which a tire may be inflated.
Uniform tire quality grading
For details, see “Uniform Tire Quality Grading” that follows.
Tire information
Typical tire symbols
A
B
C
D
E
F
G
H
I
J

4268-1. Specifications
Summer tires or all season tires (P.346)
An all season tire has “M+S” on the sidewall. A tire not marked “M+S” is a summer tire.
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 cert ifies 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
Vehicle Safety Standards.
■Typical tire size information
The illustration indicates typical tire
size.
K
Typical DOT and Tire Identifica-
tion Number (TIN)
A
B
C
D
E
F
GTire size
A
B
C
D
E
F

4308-1. Specifications
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 tireThe load on an individual tire that is determined by distribut-
ing 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 distribut-
ing to each axle its share of curb weight, accessory weight,
and normal occupant weight (distributed in accordance with
Table 1
* below), and dividing by two
Weather sideThe surface area of the rim not covered by the inflated tire
BeadThe part of the tire that is ma de of steel wires, wrapped or
reinforced by ply cords and th at 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 substantially 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 compounds
CrackingAny parting within the tread, side wall, or innerliner of the tire
extending to cord material
CT
A pneumatic tire with an inverted flange tire and rim system
in which the rim is designed wi th 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 tireA tire designed to operate at higher loads and at higher
inflation pressures than the corresponding standard tire
Tire related termMeaning

4468-3. Initialization
8-3.Initialization
*:If equipped
Items to initialize
The following items must be initialized for normal system operation after such
cases as the 12-volt battery being re connected, or maintenance being per-
formed on the vehicle.
List of the items to initialize
ItemWhen to initializeReference
PKSB (Parking Support Brake)*• After reconnecting or changing the 12-volt batteryP.247
Message indicating maintenance is
required• After the maintenance is per-formedP.328
Tire pressure warning system
• When rotating the tires
• When the tire inflation pressure is changed by changing tire size.
(When there are multiple speci-
fied pressures)
• After registering the ID codes
P.351
Oil maintenance• After the maintenance is per- formedP.339
Lexus parking assist monitor
• 12-volt battery has been rein-stalled
• The steering wheel has been moved while the 12-volt battery
was being reinstalled
• 12-volt battery power is low
Refer to the
“NAVIGA-
TION AND MULTIME- DIA SYS- TEM
OWNER’S
MANUAL”.
Power back door*• After reconnecting or changing the 12-volt battery
• After changing a fuse
P.119
Power window
• When functioning abnormally
P.145
Moon roof*P.148

Alphabetical Index473
Tire inflation pressure display function
.........................................................................348
Warning light ............................................... 387
Tire information ............................................ 425 Glossary......................................................... 429
Size.................................................................... 426
Tire identification number ..................... 426
Uniform Tire Quality Grading............ 427
Tire pressure warning system Function ..........................................................348
Initializing .........................................................351
Installing tire pressure warning valves and transmitters ..................................... 350
Registering ID codes ............................... 352
Warning light ............................................... 387
Tires................................................................... 345 Chains ............................................................. 264
Checking ....................................................... 345
If you have a flat tire ..................................399
Inflation pressure..........................................361
Information .................................................... 425
Replacing .......................................................355
Rotating tires ................................................ 347
Run-flat tires ..................................... 347, 399
Size.................................................................... 422
Snow tires ...................................................... 263
Tire pressure warning system .............348
Warning light ............................................... 387
Tools.......................................................296, 355
Top tether strap............................................... 54
Total load capacity ........................................416
Towing Dinghy towing ................................................ 161
Emergency towing .................................... 381
Towing eyelet ..............................................384
Trailer towing ................................................ 160
TRAC (Traction Control) ........................ 257
Traction battery (hybrid battery) ............. 65 Hybrid battery (traction battery) air vents............................................................................ 67
Location............................................................. 65
Specification .................................................. 418 Warning message ........................................68
Traction Control (TRAC) ........................ 257
Traction motor (electric motor) ............... 62
Trailer towing ................................................. 160
Transmission Hybrid transmission....................................167
Paddle shift switches .......................169, 170
S mode ............................................................. 170
Selecting the driving mode ...................255
Trip meters ............................................... 80, 86
Turn signal lights Replacing light bulbs ................................ 374
Turn signal lever ............................................ 171
Wattage .......................................................... 422
U
USB charging ports.................................... 302
V
Vanity lights..................................................... 301Wattage .......................................................... 422
Vanity mirrors ................................................ 301
Vehicle data recording ....................................7
Vehicle identification number ..................416
Vehicle Stability Cont rol (VSC) ........... 256
Ventilators (seat ventilators)................... 286
VSC (Vehicle Stability Control) ........... 256
W
Warning buzzers ABS .................................................................. 388
Airbags........................................................... 388
Approach warning.................................... 222
Brake hold .................................................... 389
Brake Override System .......................... 391
Brake system............................................... 386
Charging system....................................... 386
Downshifting ................................................... 171
Drive-Start Control.................................... 391
Electric power steering.......................... 388

474Alphabetical Index
Engine ............................................................. 387
High coolant temperature .................... 387
Hybrid system overheat......................... 392
Hybrid system ............................................. 387
Intuitive parking assist................. 238, 389
Low engine oil pressure.........................386
LTA (Lane Tracing Assist)......... 205, 391
Open door.............................................. 109, 111
Open hood........................................................ 111
Open window ...............................................146
PKSA (Parking Support Alert) ............. 231
PKSB (Parking Support Brake) .........390
Pre-collision braking................................. 198
RCTA (Rear Cross Traffic Alert) ......389
Seat belt ............................................... 390, 391
Warning lights............................................... 386 ABS ................................................................. 388
Brake hold operated indicator ...........389
Brake Override System ...........................391
Brake system ...............................................386
Charging system .......................................386
Drive-Start Control ....................................391
Electric power steering ......................... 388
High coolant temperature .................... 387
Intuitive parking assist OFF indicator.........................................................................389
Low engine oil pressure.........................386
Low fuel level ...............................................390
LTA indicator .................................................391
Malfunction indicator lamp................... 387
Parking brake indicator ..........................389
PKSB OFF indicator ................................390
Pre-collision system ................................. 392
RCTA OFF indicator...............................389
Seat belt reminder light ............... 390, 391
Slip indicator ............................................... 388
SRS................................................................... 388
Tire pressure ................................................ 387
Warning messages ..................................... 395
Washer Checking ......................................................... 341
Preparing and checking before winter ..........................................................................263
Switch..................................................... 184, 188
Washing and waxing.................................. 322
Weights Cargo capacity .............................................157
Load limits ...................................................... 160
Weights ........................................................... 416
Wheels ............................................................. 363 Size .................................................................... 422
Window glasses .............................................145
Window lock switch .....................................146
Windows Power windows ........................................... 145
Rear window defogger........................... 277
Washer ................................................. 184, 188
Windshield wiper de-icer ..........................281
Windshield wipers Intermittent windshield wipers ............. 184
Position............................................................. 186
Rain-sensing windshield wipers .......... 184
Winter driving tips....................................... 263
Wireless remote control key ................... 106 Battery-saving function............................ 125
Locking/Unlocking ................................... 106
Panic mode .................................................... 106
Replacing the battery .............................. 368
For information regarding the equipment listed below, refer to
the “NAVIGATION AND MULTI-
MEDIA SYSTEM OWNER’S
MANUAL”.
· Audio/video system
· Navigation system
· Lexus parking assist monitor
· Lexus Enform