2010 Lexus HS250h wheel

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6-1. Specifications
6
Vehicle specifications
Tires and wheels
Ty p e A
Ty p e B
Ti r e s i z eP215/55R17 93V, T145/70D17 106M (spare)
Tire inflation pressure
(recommended cold tire
inflation pressure)
Driving under normal conditions 
Front: 
33 psi (230 kPa, 2.3 kgf/cm
2 or bar)
Rear: 
33 psi (230 kPa, 2.3 kgf/cm
2 or bar)
Spare: 
60 psi (420 kPa, 4.2 kgf/cm
2 or bar)
Wheel size17  7J, 17  4T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)
Ti r e s i z eP225/45R18 91W, T145/70D17 106M (spare)
Tire inflation pressure
(recommended cold tire
inflation pressure)
Driving under normal conditions 
Front: 
33 psi (230 kPa, 2.3 kgf/cm
2 or bar)
Rear: 
32 psi (220 kPa, 2.2 kgf/cm
2 or bar)
Spare: 
60 psi (420 kPa, 4.2 kgf/cm
2 or bar)
Wheel size18  7 1 /2J, 17  4T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

563
6-1. Specifications
6
Vehicle specifications
Tire size
■Typical tire size information
The illustration indicat es typical tir
e size.
Tire use 
(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)
■ T
ire dimensions
Section width
Ti r e h e i g h t
Wheel diameter

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6-1. Specifications
6
Vehicle specifications
■Treadwear
The treadwear grade is a comparative r
ating based on the wear rate of
the tire when tested under controll ed conditions on a specified gov-
ernment test course.
For example, a tire graded 150 would wear one and a half (1 - 1 /2) times as
well on the government course as a tire graded 100. 
The relative performance of tires de pends upon the actual conditions of
their use
. Performance may differ significantly from the norm due to varia -
tions in driving habits, service practices
and differences in road characteris-
tics and climate.
■ Traction AA, A, B, C
The traction grades, from highest to lo
west, are AA, A, B and C, and
they represent the tire’s ability to stop on wet pavement as measured
under controlled condit ions on specified government test surfaces of
asphalt and concrete.
A tire marked C may have poor traction performance.
Warning: The traction grade assigned to t
his tire is based on braking
(straight ahead) traction tests and does not include cornering (turning) trac-
tion.
■ Temperature A, B, C
The temperature grades are A (the hi ghest), B
, and C, representing
the tire’s resistance to the generation of heat and its ability to dissipate
heat when tested under controlled conditions on a specified indoor
laboratory test wheel.
Sustained high temperature can cause the material of the tire to degenerate
and reduce tire life, and excessive temperature can lead to sudden tire fail -
ure.
Grade C corresponds to a level of performance which all passenger car
tir
es must meet under the Federal Mo tor Vehicle Safety Standard No. 109.
Grades B and A represent higher levels of performance on the laboratory
test wheel than the minimum r
equired by law.

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6-1. Specifications
6
Vehicle specifications
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
Vehicle maximum load on
the tireThe 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 it by two
We a t h e r s i d eThe surface area of the rim not covered by the
inflated tire
Tire related termMeaning

570
6-1. Specifications
Ply separationA parting of rubber compound 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
SidewallThat portion of a tire between the tread and bead
Sidewall separationThe 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 mThe 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 dThat portion of a tire that comes into contact with the
road
Tire related termMeaning

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6-1. Specifications
6
Vehicle specifications
*: Table 1  Occupant loading and distribution for vehicle normal load for
various designated seating capacities
Tr e a d r i bA tread section running circumferentially around a
tire
Tr e a d s e p a r a t i o nPulling away of the tread from the tire carcass
Treadwear indicators
(TWI)The projections within the principal grooves
designed to give a visual indication of the degrees of
wear of the tread
Wheel-holding fixtureThe fixture used to hold the wheel and tire assembly
securely during testing
Designated seating
capacity, Number of occupantsVehicle normal load,
Number of occupantsOccupant distribution in
a normally loaded vehicle
2 through 422 in front
5 through 1032 in front, 1 in second seat
11 through 155
2 in front, 1 in second
seat, 1 in third seat, 1 in fourth seat
16 through 207
2 in front, 2 in second
seat, 2 in third seat, 1 in
fourth seat
Tire related termMeaning

592
Alphabetical index
Alphabetical index
A/CAir conditioning filter .......................450
Automatic air conditioning 
system .................................................. 252
ABS............................................................. 225
AFS .............................................................. 185
Adaptive front lighting system ......... 185
Air conditioning filter ......................... 450
Air conditioning system Air conditioning filter .......................450
Automatic air conditioning 
system .................................................. 252
Airbags Airbag operating 
conditions.................................. 106, 107
Airbag precautions for your 
child.......................................................... 110
Airbag warning light ........................ 493
Curtain shield airbag operating 
conditions.............................................107
Curtain shield airbag 
precautions .......................................... 110
Front passenger occupant 
classification system......................... 115
General airbag precautions ........... 110
Locations of airbags.......................... 103
Modification and disposal of 
airbags .....................................................114
Proper driving po sture ............. 101, 110
Side airbag operating 
conditions.............................................107
Side airbag precautions .................... 110
Side and curtain shield airbags 
operating conditions ......................107
Side and curtain shield airbags 
precautions .......................................... 110
SRS airbags ........................................... 103 Alarm ............................................................ 98
Antenna .................................................... 270
Anti-lock brake system ...................... 225
Armrest .....................................................377
Audio input.............................................. 307
Audio system
Antenna...................................................270
Audio input ........................................... 307
Audio visual input.............................. 307
AUX adapter ...................................... 307
CD player .............................................. 273
CD player/changer .......................... 273
MP3/WMA disc................................. 281
Optimal use ......................................... 304
Portable music player ..................... 307
Radio ....................................................... 265
Steering wheel audio switch........308
Audio visual input ................................. 307
Automatic air conditioning system Air conditioning filter ....................... 450
Air conditioning system ..................252
Automatic air conditioning 
system...................................................252
Automatic headlight leveling 
system ......................................................187
Automatic light control system........ 183
AUX adapter ......................................... 307
Auxiliary box .......................................... 370A

601
Alphabetical index
Steering wheelAdjustment ...............................................79
Audio switches ...................................308
Manual adjustment ...............................79
Power adjustment .................................79
Steering wheel position 
memory ................................................. 68
Stop light Replacing light bulbs ....................... 479
Wattage ................................................. 556
Storage feature ..................................... 363
Stuck If the vehicle becomes stuck ....... 545
Sun visors................................................... 371
Sunshade Rear .......................................................... 378
Roof ............................................................. 89
Switch Driving mode selector 
switch .................................................... 158
Engine switch ........................................ 147
Fog light switch..................................... 194
Ignition switch........................................ 147
Light switches........................................183
Mode select switch ........................... 158
Power door lock switch .....................57
Power switch ......................................... 147
Power window switch........................ 86
Tire pressure warning reset 
switch ................................................... 439
Window lock switch ........................... 86
Wiper and washer ..............................195 Tail lights
Replacing light bulbs ........................ 479
Switch........................................................ 183
Wattage ................................................. 556
Talk switch .....................................314, 333
Telephone switch ..................................333
Theft deterrent system Alarm...........................................................98
Immobilizer system ..............................96
Theft prevention labels ........................ 100
Tire inflation pressure ......................... 445
Tire information Glossary ................................................ 566
Size ........................................................... 563
Tire identification number..............562
Uniform Tire Quality Grading ... 564
Tires Chains .....................................................245
Checking ............................................... 437
Compact spare tire ........................... 521
If you have a flat tire ........................... 521
Inflation pressure ................................445
Inflation pressure sensor ............... 438
Information ........................................... 560
Replacing ................................................ 521
Rotating tires ........................................ 437
Size ........................................................... 555
Snow tires .............................................. 244
Spare tire ................................................. 521
Tire pressure warning 
system ......................................437, 495
Tools ............................................................ 521
Total load capacity ............................... 243T