2012 Lexus LFA inflation pressure

377
6-1. Specifications
6
Vehicle specifications
Glossary of tire terminology
Tire related termMeaning
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)
Cold tire inflation pres-
sure Tire 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
Curb weight The weight of a motor vehicle with standard equip-
ment, including the maximum capacity of fuel, oil and
coolant, and if so equipp
ed, air conditioning and
additional weight optional engine
Maximum inflation pres-
sure The maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire
Maximum loaded vehicle
weight The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight 150 lb. (68 kg) times the number of occupants speci-
fied in the second column of Table 1
* that follows
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

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

379
6-1. Specifications
6
Vehicle specifications
Bias ply tireA 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
Carcass The tire structure, except tread and sidewall rubber
which, when inflated, bears the load
Chunking The breaking away of pieces of the tread or sidewall
Cord The strands forming the plies in the tire
Cord separation The parting of cords from adjacent rubber com-
pounds
Cracking Any 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
Groove The space between two adjacent tread ribs
Innerliner The layer(s) forming the inside surface of a tubeless
tire that contains the inflating medium within the tire
Innerliner separation The parting of the innerliner from cord material in the
carcass
Tire related termMeaning

380
6-1. Specifications
Intended outboard side-
wall(a) The sidewall that contains a whitewall, bears
white lettering, or bear s manufacturer, brand,
and/or model name molding that is higher or
deeper than the same molding on the other side-
wall of the tire, or
(b) The outward facing sidewall of an 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 rating The maximum load that a tire is rated to carry for a
given inflation pressure
Maximum load rating The load rating for a tire at the maximum permissible
inflation pressure for that tire
Maximum permissible
inflation pressure The maximum cold inflation pressure to which a tire
may be inflated
Measuring rim The rim on which a tire is fitted for physical dimension
requirements
Open splice Any parting at any junction of tread, sidewall, or
innerliner that extends to cord material
Outer diameter The overall diameter of an inflated new tire
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 10000 lb. or
less.
Ply A layer of rubber-coated parallel cords
Tire related termMeaning

381
6-1. Specifications
6
Vehicle specifications
Ply separationA parting of rubber comp
ound 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 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
Sidewall That portion of a tire between the tread and bead
Sidewall separation The 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 m The rim on which a tire is fitted for testing, and may be
any rim listed as appropriate for use with that tire
Tr e a d That portion of a tire that comes into contact with the
road
Tire related termMeaning

386
6-3.Initialization
Items to initialize
The following items must be initialized for normal system operation in cases
such as after maintenance is performed on the vehicle.
ItemWhen to initializeReference
Oil maintenance After changing engine oil P. 132
Tire pressure warning
system When changing the tire inflation pres-
sure by changing traveling speed.
P. 2 7 1

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

418
GAS STATION INFORMATION
Auxiliary catch leverP. 2 5 0Rear hatch openerP. 2 9Fuel filler doorP. 4 9
Hood release lever P. 2 5 0Fuel filler door opener P. 4 9Tire inflation pressureP. 3 6 6
Fuel tank capacity
(Reference)19.3 gal. (73 L, 16.1 Imp. gal.)
Fuel typeUnleaded gasoline only
Cold tire inflation
pressure
Vehicle speedFrontRear
Less than 155
(250)
[mph (km/h)]33 (230, 2.3) [psi (kPa, kgf/cm2 or
bar)]
155 (250) or
more
[mph (km/h)]41 (280, 2.8) [psi (kPa, kgf/cm2 or
bar)]
Engine oil brand“Mobil 1 5W-50”