2013 Lexus GS350 wheel

760
GS350_U (OM30C34U)
8-1. Specifications
Ty p e C
Compact spare tire
Ti r e s i z e235/40R19 96Y XL, 265/ 35R19 94Y,
235/40R19 96V XL
Tire inflation pressure
(Recommended cold tire
inflation pressure)Front tire35 psi (240 kPa, 2.4 kgf/cm2 or bar)
Rear tire 36 psi (250 kPa, 2.5 kgf/cm
2 or bar)
Wheel size19  8J (235/40R19), 19  9J (265/35R19)
Wheel nut torque76 f t•lbf (103 N•m, 10.5 kgf•m)
Ti r e s i z eT155/70D17 110M, T145/70D18 107M
Tire inflation pressure
(Recommended cold tire
inflation pressure)
60 psi (420 kPa, 4.2 kgf/cm2 or bar)
Wheel size17  4T (T155/70D17), 18  4T (T145/70D18)
Wheel nut torque76 f t•lbf (103 N•m, 10.5 kgf•m)

768
GS350_U (OM30C34U)
8-1. 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 dimensionsSection width
Tire height
Wheel diameter
Tire size
1
2
3
4
5
6
7
1
2
3

GS350_U (OM30C34U)
7718-1. Specifications
8
Vehicle specifications
■Temperature A, B, C
The temperature grades are A (the highest), B, and C, representing the
tire’s resistance to the generation of heat and its ability to dissipate heat
when tested under controlled conditio ns on a specified indoor labora-
tory test wheel.
Sustained high temperature can cause th e material 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 performance 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, underinflation, or excessive loading, either separately or in
combination, can cause heat buildup and possible tire failure.

GS350_U (OM30C34U)
7738-1. Specifications
8
Vehicle specifications
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 tireThe 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 tire that is determined by
distributing to each axle its share of curb weight,
accessory weight, and normal occupant weight (dis-
tributed in accordance with Table 1
* below), and
dividing by two
We a t h e r s i d eThe 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 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
Tire related termMeaning

GS350_U (OM30C34U)
7758-1. Specifications
8
Vehicle specifications
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 mate rials, that, when mounted
on an automotive wheel, provides the traction and
contains the gas or flui d 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
Snow tire
A tire that attains a traction index equal to or greater
than 110, compared to the ASTM E-1136 Standard
Reference Test Tire, when using the snow traction test
as described in ASTM F-1805-00, Standard Test
Method for Single Wheel Driving Traction in a
Straight Line on Snow-and Ice-Covered Surfaces,
and which is marked with an Alpine Symbol ( )
on at least one sidewall
Te s t r i mThe rim on which a tire is fitted for testing, and may be
any rim listed as appropriate for use with that tire
Tire related termMeaning

776
GS350_U (OM30C34U)
8-1. Specifications
*:Table 1  Occupant loading and distribution for vehicle normal load for variousdesignated seating capacities
Tr e a dThat portion of a tire that comes into contact with the
road
Tr e a d r i bA tread section running circumferentially around a
tire
Tr e a d s e p a r a t i o nPulling away of the tread from the tire carcass
Treadwear indicators
(TWI)The projections within the principal grooves
designed to give a visual indication of the degrees of
wear of the tread
Wheel-holding fixtureThe fixture used to hold the wheel and tire assembly
securely during testing
Tire related termMeaning
Designated seating
capacity, Number of occupantsVehicle normal load,
Number of occupantsOccupant distribution in a normally loaded vehicle
2 through 422 in front
5 through 1032 in front, 1 in second seat
11 through 155
2 in front, 1 in second seat, 1 in third seat, 1 in fourth seat
16 through 207
2 in front, 2 in second seat, 2 in third seat, 1 in fourth seat

806What to do if... (Troubleshooting)
GS350_U (OM30C34U)
●Did you press the engine switch while firmly depressing the
brake pedal? (P. 171)
●Is the shift lever in P? ( P. 1 74 )
●Is the electronic key anywhere detectable inside the vehicle?
( P. 1 0 4 )
●Is the steering wheel unlocked? ( P. 175)
●Is the electronic key battery weak or depleted?
In this case, the engine can be started in a temporary way.
( P. 74 1 )
●Is the battery discharged? ( P. 743)
●Is the engine switch in IGNITION ON mode?
If you cannot release the shift lever by depressing the brake
pedal with the engine switch in IGNITION ON mode
( P. 7 3 7 )
●It is locked automatically to prevent theft of the vehicle.
(P. 1 74 )
If you think something is wrong
The engine does not start
The shift lever cannot be shifted from P even if you depress the
brake pedal
The steering wheel cannot be turned after the engine is stopped

811Alphabetical index
GS350_U (OM30C34U)
Armrest door ......................................... 575
Ashtrays.................................................... 563
Assist grip .................................................577
Audio input.............................................. 476
Audio system.......................................... 367Audio input............................................ 476
AUX port/USB port.................... 476, 456, 466
Bluetooth
® audio...............................444
CD/DVD player ..................................412
CD/DVD player information ...... 432
DVD video ............................................420
iPod ...........................................................464
MP3/WMA disc ................................ 414
Optimal use .......................................... 474
Portable music player ...................... 476
Radio ....................................................... 390
Rear seat audio controls ................ 477
Steering wheel audio switch ........482
USB memory .......................................454
Automatic headlight leveling system ......................................................193
Automatic light control system ..................................................... 190
Automatic transmission .......................178 If the shift lever cannot be shifted from P ............ 737
M mode ..................................................... 181
Paddle shift switches .........................180
AUX port................................................. 476
Auxiliary boxes ...................................... 557
AVS (Adaptive Variable Suspension system).......................... 269 Back-up lights
Replacing light bulbs ....................... 670
Wattage ................................................... 761
Battery .......................................................624 Battery checking ................................ 624
If the vehicle battery is discharged .................................... 743
Preparing and checking before winter.................................................... 298
Warning light ....................................... 687
Bluetooth
®
Audio system ....................................... 444
Hands-free system (for cellular phone) .......................485
Brake Fluid .......................................................... 623
Parking brake ....................................... 186
Warning light ..........................686, 689
Warning message............................. 697
Brake assist ............................................. 268
Break-in tips ............................................. 156
Brightness control Instrument panel light control ........80
BSM (Blind Spot Monitor) ................287
B