wheel size Lexus IS250 2006 Using the audio system / LEXUS 2006 IS350/250 THROUGH APRIL 2006 PROD. (OM53508U) User Guide

382
6-1. Specifications
Ty p e E
Ti r e s i z e
Front tires: 225/40R18 88Y
Rear tires: 255/40R18 95Y
Spare tire: T145/70R17 106M
Front and rear tire inflation pres-
sure
(Recommended cold tire inflation
pressure)
Driving under normal conditions Front tires:
35 psi (240 kPa, 2.4 kgf/cm
2 or bar)
Rear tires:
38 psi (260 kPa, 2.6 kgf/cm
2 or bar)
Driving at high speeds above 100 mph (160
km/h) (in countries where such speeds are per-
mitted by law) Add 7.2 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.
Spare tire inflation pressure
(Recommended cold tire inflation
pressure)
60 psi (420 kPa, 4.2 kgf/cm2 or bar)
Wheel size
Front wheels: 18  8J
Rear wheels: 18 8 1 /2J
Spare wheel: 17  4T
Wheel nut torque10.5 kgf•m (103 N•m, 76 ft•lbf)

389
6-1. Specifications
6
Vehicle specifications
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 or 3 digits)
Speed symbol
(alphabet with one letter)
■ Tire dimensions
Section width
Ti r e h e i g h t
Wheel diameter

393
6-1. Specifications
6
Vehicle specifications
Tire related termMeaning
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
Vehicle capacity weight
(Total load capacity)The rated cargo and luggage load plus 150 lb. (68
kg) times the vehicle's designated seating capacity
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 asymmetrical tire that has a particular side that must always face
outward when mounted on a vehicle
Occupant distributionDistribution of occupants in a vehicle as specified in
the third column of Table 1
* below
Recommended inflation
pressureCold tire inflation pressure recommended by a man-
ufacturer.
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

410
Alphabetical index
Smart access system with push-button startEntry function..............................................4
Starting the engine ............................... 89
Spare tire Inflation pressure................................285
Spare tire................................................348
Spark plug ................................................ 374
Specifications .........................................370
Speedometer Speed indicator ................................... 100
Speedometer........................................ 100
Steering wheel Audio switches .....................................199
Driving position memory...................24
Manual adjustment .............................. 36
Power adjustment .................................37
Storage feature......................................205
Stuck If your vehicle becomes stuck..... 367
Sun visors .................................................... 211
Sunshade Rear .......................................................... 225
Roof ............................................................. 45
Switch ECT switch .............................................. 93
Engine switch.......................................... 89
ETCS switch............................................ 96
Fog light switch ...................................... 116
Light switches ..........................................113
Power door lock switch ...................... 15
Power window switch .......................... 41
Satellite switches .................................. 214
Transmission shift switches.............. 94
Window lock switch ............................. 41
Wipers and washer switch ...............117 Tachometer
Tacho indicator ....................................100
Tachometer............................................100
Tail lights Switch .......................................................... 113
Theft deterrent system Alarm...........................................................52
Engine immobilizer system ............. 50
Theft prevention labels.......................... 54
Tire inflation pressure ......................... 285
Tire information Glossary .................................................392
Size ........................................................... 389
Tire identification number .............388
Uniform tire quality grading......... 390
Tires Chains....................................................... 153
Checking................................................275
If you have a flat tire ......................... 348
Inflation pressure ............................... 285
Inflation pressure sensor ................276
Information ........................................... 387
Replacing .............................................. 348
Rotating tires.........................................275
Size ........................................................... 378
Snow tires................................................ 154
Tools........................................................... 348
Total load capacity ................................ 150
Towing Dinghy towing ........................... 157, 158
Emergency towing ............................. 318
Trailer towing ........................................ 156
TRAC (Traction control).....................139
Traction control (TRAC).....................139
Transmission shift switches ....................94
Trip meter ................................................. 100T