2019 Lexus GS300 tires

540
GS350_300_OM_OM30G96U_(U)8-1. Specifications
Tire size
( P. 541)
DOT and Tire Identification Number (TIN) ( P. 541)
Location of trea dwear indicators ( P. 395)
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. 544)
Maximum cold tire inflation pressure ( P. 544)
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. 399)
An all season tire has “M+S” on the side wall. 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.
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GS350_300_OM_OM30G96U_(U)
5438-1. Specifications
8
Vehicle specifications
This information has been prepared in accordance with regulations issued by the
National Highway Traffic Safety Administra tion of the U.S. Department of Trans-
portation.
It provides the purchasers and/or prospe ctive purchasers of Lexus vehicles with
information on uniform tire quality grading.
Your Lexus dealer will help answer any ques tions you may have as you read this infor-
mation.
■DOT quality grades
All passenger vehicle tires must conform to Federal Safety Requirements in
addition 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
■Treadwear
The treadwear grade is a comparative rati ng based on the wear rate of the tire
when tested under controlled conditio ns 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 actua l conditions of their use.
Performance may differ significantly from the norm due to variations in driving
habits, service practices and difference s 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 rep-
resent 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.
Uniform Tire Quality Grading

544
GS350_300_OM_OM30G96U_(U)8-1. Specifications
■Temperature A, B, C
The temperature grades are A (the highes
t), 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 ma terial 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 perfor mance 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 of a tire assume that it is properly inflated and
not overloaded.
Excessive speed, underi nflation, or excessive loading, either separately or in com-
bination, can cause heat buildup and possible tire failure.
Glossary of tire terminology
Tire related termMeaning
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 un der that condition
Maximum inflation pres-
sureThe maximum cold inflated pr essure to which a tire may
be inflated, shown on the sidewall of the tire
Recommended inflation
pressureCold tire inflation pressure recommended by a manu-
facturer
Accessory weight
The combined weight (in exce ss of those standard items
which may be replaced) of automatic 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 capacity of fuel, oil and coolant,
and if so equipped, air co nditioning 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 weight150 lb. (68 kg) times the numb er of occupants specified
in the second column of Table 1
* that follows

564
GS350_300_OM_OM30G96U_(U)8-3. Initialization
Items to initialize
*1: U.S.A. only
*2: GS350/GS300
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:
ItemWhen to initializeReference
Message indicating mainte-
nance is required
*1• After the maintenance is per- formedP. 368
Oil maintenance*2• After the maintenance is per-
formedP. 386
Tire pressure warning system
• When rotating the tires
• When changing the tire inflationpressure by changing traveling
speed or load weight, etc.
P. 397

595Alphabetical index
GS350_300_OM_OM30G96U_(U)
Radar cruise control (dynamic radar cruise control with
full-speed range) ............................... 266
Radiator .................................................... 390
Radio
*
RBDS (Radio Broadcast Data Systems)
*
Rear air conditioning system ........... 327
Rear door sunshades .......................... 347
Rear personal lights............................. 336
Rear side marker lights ...................... 222 Light switch ........................................... 222
Replacing light bulbs ........................ 422
Welcome light illumination control ......................... 144
Rear seat heaters....................................331
Rear sunshade ....................................... 347 Operation .............................................. 347
Reverse operation feature............ 348 Rear turn signal lights ........................... 216
Replacing light bulbs ....................... 422
Turn signal lever ................................... 216
Rear view mirror Inside rear view mirror...................... 175
Outside rear view mirrors .............. 177
Rear view monitor system
*
Rear window defoggers .....................322
Refueling...................................................234 Capacity................................................. 525
Fuel types............................................... 525
Opening the fuel tank cap ............ 236
When the fuel filler door cannot be opened ..........................237
Remote Touch
*......................................310
Replacing Electronic key battery ....................... 412
Fuses .......................................................... 414
Light bulbs............................................. 420
Tires .......................................................... 475
Rev indicator ..................................... 94, 101
Rev peak ............................................94, 102
Reporting safety defects for U.S. owners .................................. 566
Resetting the message indicating maintenance is required ................ 368
R
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.

597Alphabetical index
GS350_300_OM_OM30G96U_(U)
S-FLOW mode ....................................... 317
Shift lever .................................................208Automatic transmission ................. 208
If the shift lever cannot be shifted from P ..............214
Shift lever light ....................................... 335
Shift lock system......................................213
Side airbags ............................................... 42
Side display ...............................................314
Side marker lights................................. 222 Light switch ........................................... 222
Replacing light bulbs ........................ 422
Welcome light illumination control ................................................... 144
Side mirrors .............................................. 177 Adjusting and folding......................... 177
BSM (Blind spot monitor) ............ 286
Linked mirror function when reversing ..................................179
Mirror position memory .................. 166
Side turn signal lights ............................216 Replacing light bulbs ........................ 422
Turn signal lever .................................. 216
Smart access system with push-button start .......................156 Antenna location ................................. 156
Entry functions ...................................... 143
Starting the engine ........................... 203
Warning message ............................. 444
Snow mode ............................................. 209
Snow tires ................................................308 Spare tire ..................................................475
Inflation pressure................................ 532
Storage location ................................. 476
Spark plug ............................................... 529
Specifications..........................................522
Speed indicator........................................ 101
Speedometer .................................. 93, 100
Sport mode ............................................... 281
Steering lock .......................................... 205 Column lock release .......................205
Steering lock system warning message........................... 473
Steering wheel ........................................ 174 Adjustment.............................................. 174
Audio switches
*
Heated steering wheel ...................330
Power easy access system .............166
Steering wheel position memory ..............................166
Stop lights Replacing light bulbs ....................... 422
Storage feature ..................................... 338
Storage precautions ........................... 338
Stuck If the vehicle becomes stuck......... 518
Sun shade Rear .......................................................... 347
Rear door .............................................. 347
Roof ........................................................... 185
Sun visors..................................................344
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.

599Alphabetical index
GS350_300_OM_OM30G96U_(U)
Tachometer .....................................93, 100Variable red zone............................... 103
Tail lights................................................... 222 Light switch ........................................... 222
Replacing light bulbs ........................ 422
Welcome light illumination control ................................................... 144
Talk switch
*
Telephone switches*
Theft deterrent system Alarm........................................................... 79
Engine immobilizer system.............. 77
Tire inflation pressure ......................... 532 Maintenance data ..............................532
Tire inflation pressure display function ............................................... 396
Warning light .......................................439
Warning message ............................. 444
Tire information ..................................... 539 Glossary .................................................544
Size ............................................................. 541
Tire identification number............... 541
Uniform Tire Quality Grading...............................................543
Tire pressure warning system ......... 396 Function ................................................. 396
Initializing................................................397
Installing tire pressure warning valves and transmitters ............... 396
Registering ID codes ...................... 398
Warning light .......................................439
Warning message ............................. 444 Tires ........................................................... 395
Chains .....................................................306
Checking ...............................................395
Emergency tire puncture repair kit ..............................................486
If you have a flat tire ..............475, 486
Inflation pressure................................ 532
Information............................................539
Replacing ............................................... 475
Rotating tires ........................................ 396
Size ........................................................... 532
Snow tires ............................................. 308
Spare tire................................................ 475
Tire inflation pressure display function................................................ 396
Tire pressure warning system ..... 396
Warning light ....................................... 439
Warning message............................. 444
Tools ........................................................... 476
Top tether strap ....................................... 68
Torque Vectoring Differential (TVD) ......................................................294
Total load capacity............................... 200
Towing Dinghy towing ..................................... 202
Emergency towing ........................... 429
Towing eyelet ........................................ 431
Trailer towing.........................................201
TRAC (Traction Control) Function .................................................. 296
TRAC OFF switch ............................298
T
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.