2010 Lexus GS350 inflation pressure

599
6-1. Specifications
6
Vehicle specifications
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
Type B
Ti r e s i z e
225/50R17 94W, P225/50R17 93V,
P225/50RF17 93V,
T155/70D17 110M (spare)
Tire inflation 
pressure
(Recommended cold tire inflation
pressure)
Driving under normal conditions
Front: 33 psi (230 kPa, 2.3 kgf/cm2 or bar)
Rear: 33 psi (230 kPa, 2.3 kgf/cm2 or bar)
Driving at high speeds above 100 mph (160
km/h) (in countries where such speeds are
permitted by law)
Add 7 psi (50 kPa, 0.5 kgf/cm
2 or bar) to the
front tires and rear tires. Never exceed the
maximum cold tire inflation pressure indi-
cated on the tire sidewall.
Spare tire inflation pressure
(Recommended cold tire inflation
pressure)
60 psi (420 kPa, 4.2 kgf/cm2 or bar)
Wheel size17  7 1 /2 J, 17  4T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

605
6-1. Specifications
6
Vehicle specifications
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
Tire size (P. 6 0 7 )
DOT and Tire Identification Number (TIN) (P. 6 0 6 )
Location of treadwear indicators (P. 463)
Run-flat tire (RFT) or standard tire (P. 566)
This vehicle can be equipped with either run-flat tires (RFT) or standard
tires. A “RFT” or “DSST” mark is molded on the sidewall of the run-flat tire.
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 filled in the tire. A
tube type tire has a tube inside the tire and the tube maintains the air pres-
sure.
Load limit at maximum cold tire inflation pressure (P. 611)
Maximum cold tire inflation pressure (P. 611)
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 tire or all season tire (P. 468)
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 into its sidewall. This tire is designed for temporary emer-
gency use only.

611
6-1. Specifications
6
Vehicle specifications
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pres-
sureTire 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 pres-
sureThe maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire
Recommended inflation
pressureCold tire inflation pressure recommended by a man-
ufacturer
Accessory weight
The combined weight (in excess of those standard
items which may be replaced) of automatic transmis-
sion, 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 equip-
ment, including the maximum capacity of fuel, oil and
coolant, and if so equipped, 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 weight150 lb. (68 kg) times the number of occupants speci-
fied in the second column of Table 1
* that follows
Occupant distributionDistribution of occupants in a vehicle as specified in
the third column of Table 1
* below

613
6-1. Specifications
6
Vehicle specifications
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
Tire related termMeaning
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 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 com-
pounds
CrackingAny parting within the tread, sidewall, 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 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
GrooveThe space between two adjacent tread ribs

614
6-1. Specifications
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
Tire related termMeaning
InnerlinerThe layer(s) forming the inside surface of a tubeless
tire that contains the inflating medium within the tire
Innerliner separationThe parting of the innerliner from cord material in the
carcass
Intended outboard side-
wall
(a) The sidewall that contains a whitewall, bears white
lettering, or bears manufacturer, 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 asymmetrical 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 multipur-
pose passenger vehicles
Load ratingThe maximum load that a tire is rated to carry for a
given inflation pressure
Maximum load ratingThe load rating for a tire at the maximum permissible
inflation pressure for that tire
Maximum permissible
inflation pressureThe maximum cold inflation pressure to which a tire
may be inflated
Measuring rimThe rim on which a tire is fitted for physical dimension
requirements
Open spliceAny parting at any junction of tread, sidewall, or
innerliner that extends to cord material
Outer diameterThe overall diameter of an inflated new tire

615
6-1. Specifications
6
Vehicle specifications
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
Tire related termMeaning
Overall width
The linear distance between the exteriors of the side-
walls 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, multipur-
pose passenger vehicles, and trucks, that have a
gross vehicle weight rating (GVWR) of 10,000 lb. or
less
PlyA layer of rubber-coated parallel cords
Ply separationA parting of rubber compound between adjacent
plies
Pneumatic tire
A mechanical device made of rubber, chemicals, fab-
ric and steel or other materials, 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 side-
walls of an inflated tire, excluding elevations due to
labeling, decoration, or protective bands
SidewallThat portion of a tire between the tread and bead
Sidewall separationThe parting of the rubber compound from the cord
material in the sidewall

624
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
6-3. Initialization
Items to initialize
ItemWhen to initializeReference
Intuitive parking assist
• After reconnecting or changing the
battery
• After changing a fuse
P. 5 5 2
Engine oil maintenance
data• After changing engine oilP. 4 5 3
Tire pressure warning
system
• When changing the tire inflation
pressure by changing traveling speed
or load weight, etc.
• When changing the tire size.
P. 4 6 5
The following items must be initialized for normal system operation in cases
such as after the battery is reconnected, or maintenance is performed on
the vehicle.

638
Alphabetical index
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
Seat heaters/ventilators...................... 401
Seating capacity ..................................... 218
Seats
Adjustment............................................... 53
Adjustment precautions .................... 54
Child seats/child restraint 
system installation ..............................114
Cleaning................................................. 433
Driver’s seat position memory....... 55
Head restraint......................................... 60
Properly sitting in the seat .................. 91
Seat heaters ......................................... 400
Service reminder indicators ...............151
Shift lever
Automatic transmission....................139
If the shift lever cannot be 
shifted from “P”................................569
Shift lock system ....................................569
Shopping bag hooks........................... 408
Side airbags................................................ 93
Side marker lights
Switch ........................................................ 157
Side mirror
Adjusting and folding ..........................73
Mirror position memory ................... 55
Smart access system with 
push-button start
Antenna location..................................... 31
Entry function.......................................... 29
Starting the engine ..............................135
Spare tire
Inflation pressure............................... 598
Storage location ................................. 557
Spark plug ................................................594
Specifications ........................................ 586
Speedometer............................................147Steering wheel
Adjustment ...............................................70
Audio switches ....................................329
Steering wheel position 
memory ................................................. 55
Storage compartment ........................ 390
Storage feature .....................................385
Stuck
If your vehicle becomes stuck ......581
Sun visors ................................................. 393
Switch
“ENGINE START STOP” 
switch ..................................................... 135
Fog light switch ....................................160
Ignition switch ....................................... 135
Light switches........................................ 157
Mode select switch ............................ 140
Power door lock switch..................... 43
Power window switch ........................ 75
Tire pressure warning 
reset switch ....................................... 464
Tire pressure 
warning select switch .................. 466
Window lock switch ............................ 75
Wipers and washer switch............... 161
Tachometer .............................................. 147
Tail lights
Switch ........................................................ 157
Theft deterrent system
Alarm...........................................................87
Immobilizer system ............................. 85
Theft prevention labels.......................... 90
Tire inflation pressure .........................598
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