2012 Lexus IS F spare tire

492
5-2. Steps to take in an emergency
■The compact spare tire
●The compact spare tire is identified by the label “TEMPORARY USE ONLY”
on the tire sidewall.
Use the compact spare tire temporarily only in an emergency.
●Make sure to check the tire inflation pressure of the compact spare tire.
(  P. 5 2 1 )
■When using the compact spare tire
As the compact spare tire is not equipped with the tire pressure warning valve and
transmitter, low inflation pressure of the spare tire will not be indicated. Also, if you
replace the compact spare tire after the tire pressure warning light comes on, the
light remains on.
■After completing the tire change
The tire pressure warning system must be reset. ( P. 411)

494
5-2. Steps to take in an emergency
CAUTION
■When using the compact spare tire
●Remember that your compact spare tire is specifically designed for use with your
vehicle. Do not use your compact spare tire on another vehicle.
●Do not use the compact spare tire as a rear tire. If you have a flat rear tire, replace
a front tire with the compact spare tire firs t and then replace the flat rear tire with
the tire removed from the front.
●Do not use more than one compact spare tire simultaneously.
●Replace the compact spare tire with a standard tire as soon as possible.
●Avoid sudden acceleration, deceleration an d braking, as well as sharp cornering.
■Speed limit when using the compact spare tire
Do not drive at speeds in excess of 50 mph (80 km/h) when a compact spare tire is
installed on the vehicle.
The compact spare tire is not designed for driving at high speeds. Failing to observe
this precaution may lead to an accident causing death or serious injury.
■When the spare tire is installed
The vehicle speed may not be correctly detected, and the following systems may
not operate correctly:
●ABS & brake assist
●VSC
●TRAC
●VDIM
●Navigation system (if equipped)
●Intuitive parking assist (if equipped)
●Dynamic radar cruise control (if equipped)
●Cruise control (if equipped)
●PCS (if equipped)
●LSD
●Automatic headlight leveling system

5
When trouble arises
495
5-2. Steps to take in an emergency
NOTICE
■Do not drive the vehicle with a flat tire
Do not continue driving with a flat tire.
Driving even a short distance with a flat tire can damage the tire and the wheel
beyond repair.
■Be careful when driving over bumps with the compact spare tire installed on the
vehicle
The vehicle becomes lower when driving with the compact spare tire compared to
when driving with standard tires. Be careful when driving over uneven road sur-
faces.
■Driving with tire chains and the compact spare tire
Do not fit tire chains to the compact spare tire.
Tire chains may damage the vehicle body and adversely affect driving performance.
■When replacing the tires
When removing or fitting the wheels, tire s or the tire pressure warning valve and
transmitter, contact your Lexus dealer as the tire pressure warning valve and trans-
mitter may be damaged if not handled correctly.
■To avoid damage to the tire pressure warning valves and transmitters
When a tire is repaired with liquid seal ants, the tire pressure warning valve and
transmitter may not operate properly. If a liquid sealant is used, contact your Lexus
dealer or other qualified service shop as so on as possible. Make sure to replace the
tire pressure warning valve and transmitter when replacing the tire. ( P. 4 1 0 )

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.

527
6-1. Specifications
6
Vehicle specifications
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 ti re and the tube maintains the air pres-
sure.
Load limit at maximum cold tire inflation pressure ( P. 4 1 6 )
Maximum cold tire inflation pressure ( P. 521)
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. 4 1 6 )
An all season tire has “M+S” on the sidewall. A tire not marked “M+S” is a
summer tire.
“TEMPORARY USE ONLY” ( P. 4 9 2 )
A compact spare tire is identified by the phrase “TEMPORARY USE
ONLY” molded into its sidewall. This tire is designed for temporary
emergency use only.

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”.