2012 Lexus IS F tire size

425
4-3. Do-it-yourself maintenance
4
Maintenance and care
■Tire and wheel replacement (if equipped)
CAUTION
■When replacing wheels
●Do not use wheels that are a different size from those recommended in the
Owner’s Manual, as this may result in loss of handling control.
●Never use an inner tube in a leaking wheel which is designed for a tubeless tire.
Doing so may result in an accident, causing death or serious injury.
NOTICE
■Replacing tire inflation pressure warning valves and transmitters
●Because tire repair or replacement may affect the tire pressure warning valves
and transmitters, make sure to have tires serviced by your Lexus dealer or other
qualified service shop. In addition, make sure to purchase your tire pressure
warning valves and transmitters at your Lexus dealer.
●Ensure that only genuine Lexus wh eels are used on your vehicle.
Tire pressure warning valves and transmitters may not work properly with non-
genuine wheels.
Each tire and wheel is designed only for its
original position on the vehicle.
Therefore, when replacing tires and wheels
make sure that they are fitted in the position
indicated on the reverse side of the wheel.
“FR”: Front right-hand side
“FL”: Front left-hand side
“RR”: Rear right-hand side
“RL”: Rear left-hand side

5
When trouble arises
471
5-2. Steps to take in an emergency
CAUTION
■Maintenance of the tires
Each tire, including the spare (if provided), should be checked monthly when cold
and inflated to the inflation pressure re commended by the vehicle manufacturer on
the vehicle placard or tire inflation pressure label (tire and load information label).
(If your vehicle has tires of a different size than the size indicated on the vehicle
placard or tire inflation pressure label [tire and load information label], you should
determine the proper tire inflation pressure for those tires.)
As an added safety feature, your vehicl e has been equipped with a tire pressure
monitoring system (TPMS-tire pressure warning system) that illuminates a low tire
pressure telltale (tire pressure warning light) when one or more of your tires is sig-
nificantly under-inflated. Accordingly, when the low tire pressure telltale (tire pres-
sure warning light) illuminates, you should stop and check your tires as soon as
possible, and inflate them to the proper pressure. Driving on a significantly under-
inflated tire causes the tire to overheat an d can lead to tire failure. Under-inflation
also reduces fuel efficiency and tire tread life, and may affect the vehicle's handling
and stopping ability.
Please note that the TPMS (tire pressure warning system) is not a substitute for
proper tire maintenance, and it is the driver's responsibility to maintain correct tire
pressure, even if under-inflation has not reached the level to trigger illumination of
the TPMS low tire pressure telltale (tire pressure warning light).
Your vehicle has also been equipped with a TPMS (tire pressure warning system)
malfunction indicator to indicate when th e system is not operating properly. The
TPMS (tire pressure warning system) malf unction indicator is combined with the
low tire pressure telltale (tire pressure warning light). When the system detects a
malfunction, the telltale will flash for approximately one minute and then remain
continuously illuminated. This sequence will continue upon subsequent vehicle
start-ups as long as the malfunction exists . When the malfunction indicator is illumi-
nated, the system may not be able to detect or signal low tire pressure as intended.
TPMS (tire pressure warning system) malfunctions may occur for a variety of rea-
sons, including the installation of replacem ent or alternate tires or wheels on the
vehicle that prevent the TPMS (tire pressure warning system) from functioning
properly. Always check the TPMS (tire pressure warning system) malfunction tell-
tale after replacing one or more tires or wheels on your vehicle to ensure that the
replacement or alternate tires and wheels allow the TPMS (tire pressure warning
system) to continue to function properly.

521
6-1. Specifications
6
Vehicle specifications
Steering
Tires and wheels
Free playLess than 1.2 in. (30 mm)
Ti r e s i z e
Front: 225/40R19 93Y
Rear: 255/ 35R19 96Y
Spare: T135/70R18 103M
Front and rear tire inflation pres-
sure
(Recommended cold tire inflation
pressure)
Front:
36 psi (250 kPa, 2.5 kgf/cm2 or bar)*
Rear:
36 psi (250 kPa, 2.5 kgf/cm
2 or bar)*
Spare:
60 psi (420 kPa, 4.2 kgf/cm
2 or bar)
*: When driving at high speeds above 100 mph
(160 km/h), in countries where such speeds
are permitted by law, add 9.0 psi (60 kPa, 0.6
kgf/cm
2 or bar) to the front tires and rear tires.
Never exceed the maximum cold tire inflation
pressure indicated on the tire sidewall.
Wheel size
Ty p e A
Front wheels: 19  8J
Rear wheels: 19  9J
Spare wheel: 18  4T
Ty p e B
Front wheels: 19  8 1 /2J
Rear wheels: 19  9 1 /2J
Spare wheel: 18  4T
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

526
6-1. Specifications
Tire information
Ty p i c a l t i r e s y m b o l s
Standard tire
Compact spare tire
Tire size (P. 5 2 8 )
DOT and Tire Identification Number (TIN) ( P. 5 2 8 )
Location of treadwear indicators ( P. 410)
Tire ply composition and materials
Plies are layers of rubber-coated parallel cords. Cords are the strands
which form the plies in a tire.

528
6-1. Specifications
Typical DOT and tire identification number (TIN)DOT symbol
*
Tire Identification Number (TIN)
Tire manufacturer's identifica-
tion mark
Tire size code
Manufacturer's optional tire
type code (3 or 4 letters)
Manufacturing week
Manufacturing year
*: The DOT symbol certifies thatthe tire conforms to applicable
Federal Motor Vehicle Safety
Standards.
Tire size
■ Typical tire size information
The illustration indicates typical
tire size.
Ti r e u s e
(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)

532
6-1. Specifications
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
Production options
weight
The combined weight of installed regular production
options weighing over 5 lb. (2.3 kg) in excess of the
standard items which they replace, not previously
considered in curb weight or accessory weight,
including heavy duty brakes, ride levelers, roof rack,
heavy duty battery, and special trim
RimA metal support for a tire or a tire and tube assembly
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
Tire related termMeaning

569
Alphabetical index
Spare tireInflation pressure ............................... 420
Storage location................................. 487
Spark plug .................................................518
Specifications........................................... 512
Speedometer ...........................................150
Steering wheel Adjustment .............................................. 70
Audio switches .................................... 277
Steering wheel positionmemory ................................................. 55
Storage feature ..................................... 334
Stuck If your vehicle becomes stuck ... 508
Sun visors................................................. 340
Sunshade .................................................... 80
Switch Emergency flasher switch ............. 454
Engine switch ........................................ 134
Fog light switch.....................................166
F-sport mode total control switch .......................................... 140, 199
Hazard light switch........................... 454
Ignition switch........................................ 134
Light switches........................................ 162 Power door lock switch .................... 46
Power window switch ........................ 76
Satellite switches.................................343
SNOW switch ..................................... 140
Transmission shift
switches ........................................ 141, 143
Window lock switch............................ 76
Wiper and washer switch............... 168
Tachometer.............................................. 150
Tail lights Switch.........................................................162
Talk switch* .............................................304
Telephone switch*................................304
Theft deterrent system Alarm.......................................................... 88
Engine immobilizer system..............86
Theft prevention labels ........................... 91
Tire inflation pressure .........................420
Tire information Glossary .................................................. 531
Size ........................................................... 528
Tire identification number............. 528
Uniform tire quality grading .........529
T
*: For vehicles with a navigation system, refe r to the “Navigation System Owner’s Manual”.

570
Alphabetical index
TiresChains ....................................................... 214
Checking ................................................ 410
If you have a flat tire .......................... 487
Inflation pressure................................ 420
Inflation pressure sensor................. 410
Information............................................ 526
Replacing ............................................... 487
Rotating tires ......................................... 410
Size .............................................................521
Snow tires ................................................ 214
Tools ........................................................... 487
Total load capacity ................................ 213
Towing Dinghy towing ....................................... 217
Emergency towing ...........................455
Trailer towing......................................... 216
TRAC.......................................................... 197
Traction control ...................................... 197
Transmission shift switches ........ 141, 143
Trip meter ................................................. 150
Trunk Extending trunk space .................... 352
Opener ...................................................... 50
Trunk light Trunk light................................................... 51
Wattage.................................................. 522 Turn signal lights
Replacing light bulbs ........................ 447
Switch ........................................................ 147
Wattage ..................................................522
USB port* ..................................... 256, 264
Vanity lights Vanity lights............................................ 341
Wattage ..................................................522
Vanity mirrors ..........................................341
VDIM........................................................... 197
Vehicle dynamics integrated management ......................................... 197
Vehicle identification number.......... 513
Vehicle stability control ....................... 197
Voice command switch ..................... 304
VSC ............................................................. 197
Warning buzzers Brake system ....................................... 463
Open door .......................................... 466
Seat belt reminder ............................ 466
U
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W