2012 Lexus LFA tire size

320
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 pressu re 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 and 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 driv er'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) malfunction 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 pres sure 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.

366
6-1. Specifications
Tires and wheels
Ti r e s i z e265/35ZR20 (95Y), 305/30ZR20 (99Y)
Front and rear tire inflation pres-
sure
(Recommended cold tire inflation
pressure) Front:
33 psi (230 kPa, 2.3 kgf/cm
2 or bar)
Rear: 33 psi (230 kPa, 2.3 kgf/cm
2 or bar)
Driving at high speeds (above 155 mph [250
km/h]) (in countries where such speeds are
permitted by law) Add 8 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 indicated
on the tire sidewall.
Wheel size Front: 20 
9 1 /2J
Rear: 20  11 1 /2J
Wheel bolt torque 81 ft•lbf (110 N•m, 11.2 kgf•m)

372
6-1. Specifications
DOT and Tire Identification Number (TIN)(P. 3 7 2 )
Tire ply composition and materials
Plies are layers of rubber-coated parallel cords. Cords are the strands which
form the plies in a tire.
Load limit at maximum cold tire inflation pressure ( P. 273)
Maximum cold tire inflation pressure ( P. 366)
This means the pressure to which a tire may be inflated.
Location of treadwear indicators ( P. 270)
Summer tires or all season tires ( P. 273)
An all season tire has “M+S” on the sidewall. A tire not marked “M+S” is a
summer tire.
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.

373
6-1. Specifications
6
Vehicle specifications
Tire size■ Typical tire size information
The illustration indicates typical tire size.
Section width (millimeters)
Aspect ratio
(tire height to section width)
Speed category (alphabet with
one letter)
Tire construction code
(R = Radial, D = Diagonal)
Wheel diameter (inches)
Load index (2 digits or 3 digits)
Speed symbol
(alphabet with one letter)
■ Tire dimensions
Section width
Ti r e h e i g h t
Wheel diameter

378
6-1. Specifications
Vehicle capacity weight
(Total load capacity)The rated cargo and luggage load plus 150 lb. (68
kg) times the vehicle's designated seating capacity
Occupant distribution Distribution of occupants in a vehicle as specified in
the third column of Table 1
* below
Recommended inflation
pressure Cold tire inflation pressure recommended by a man-
ufacturer.
Rim A 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 designation Rim diameter and width
Rim type designation The industry manufacturer's designation for a rim by
style or code
Rim width Nominal distan ce between rim flanges
Vehicle maximum load on
the tire The 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 e The 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 separation A breakdown of the bond between components in
the bead
Tire related termMeaning

412
Alphabetical index
Switch“ENGINE START” switch ............... 98
Active rear wing ..................................... 171
Air conditioning system......... 186, 194
Audio system ....................................... 202
AUTO driving mode button......... 104
Control pad ............................................125
Driving mode selector switch ...... 104
Emergency flasher switch ............. 302
Hazard light switch ........................... 302
Interior lights.........................................208
Light switches ....................................... 158
Paddle shift switches ..........................102
Parking brake ..........................................113
Power door lock switch .................... 25
Power window switch ........................ 46
Reverse selector switch .................. 103
Shift speed selector ............................107
Talk switch*
1............................................ 191
Turn signal lever ................................... 167
VSC off switch ........................................112
Wipers and washer switch ............ 160 Tachometer
Tacho indicator .................................... 129
Tachometer.............................................. 116
Rev Peak.................................................. 148
Tail lights Replacing light bulbs ....................... 299
Switch ........................................................158
Talk switch*
1................................................... 191
Theft deterrent system Alarm.......................................................... 55
Engine immobilizer system ..............53
Timer Lap timer ................................................. 142
Tire information Glossary ................................................. 377
Size ............................................................373
Tire identification number .............. 372
Uniform tire quality grading..........375
Tire inflation pressure ............... 132, 366
Tire inflation pressure gauge ........... 278
Tires Air gauge................................................278
Chains.........................................................181
Checking................................................270
If you have a flat tire ..........................332
Inflation pressure ..................... 132, 366
Inflation pressure sensor ................270
Information ............................................. 371
Size ........................................................... 366
Snow tires................................................180
Tire inflation pressure gauge........278
Tire inflation pressure label ........... 277
Tool bag....................................... 281, 332
T