2010 Lexus GS450h tires

596
6-1. Specifications
GS_HV_U (OM30C81U)
February 1, 2010 11:10 am
Steering
Tires and wheels
Free playLess than 1.2 in. (30 mm)
Ti r e s i z e
245/40R18 93Y, 245/40RF18 93Y, 
P245/40R18 93V, P245/40RF18 93V,
245/40ZR18, T155/70D17 110M (spare)
Tire inflation pressure
(Recommended cold tire inflation
pressure)
Driving under normal conditions
Front: 35 psi (240 kPa, 2.4 kgf/cm2 or bar)
Rear: 35 psi (240 kPa, 2.4 kgf/cm2 or bar)
Driving at high speeds above 100 mph (160
km/h) (in countries where such speeds are per-
mitted by law)
Add 9 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.
Spare tire inflation pressure
(Recommended cold tire inflation
pressure)
60 psi (420 kPa, 4.2 kgf/cm2 or bar)
Wheel size18  8J, 17  4T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

602
6-1. Specifications
GS_HV_U (OM30C81U)
February 1, 2010 11:10 am
Tire size (P. 6 0 4 )
DOT and Tire Identification Number (TIN) (P. 603)
Location of treadwear indicators (P. 4 7 5 )
Run-flat tire (RFT) or standard tire (P. 570)
This vehicle can be equipped with either run-flat tires (RFT) or standard
tires. A “RFT” or “DSST” mark is molded on the sidewall of the run-flat tire.
Tire ply composition and materials
Plies are layers of rubber-coated parallel cords. Cords are the strands
which form the plies in a tire.
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 tire and the tube maintains the air pres-
sure.
Load limit at maximum cold tire inflation pressure (P. 6 0 8 )
Maximum cold tire inflation pressure (P. 6 0 8 )
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. 480)
An all season tire has “M+S” on the sidewall. A tire not marked “M+S” is a
summer tire.
“TEMPORARY USE ONLY”
A compact spare tire is identified by the phrase “TEMPORARY USE
ONLY” molded into its sidewall. This tire is designed for temporary emer-
gency use only.

606
6-1. Specifications
GS_HV_U (OM30C81U)
February 1, 2010 11:10 am
Uniform Tire Quality Grading
This information has been prepared in accordance with regulations
issued by the National Highway Traffic Safety Administration of the U.S.
Department of Transportation.
It provides the purchasers and/or prospective purchasers of Lexus vehi-
cles with information on uniform tire quality grading.
Your Lexus dealer will help answer any questions you may have as you read
this information.
■DOT quality grades
All passenger vehicle tires must conform to Federal Safety Require-
ments in addition to these grades. Quality grades can be found where
applicable on the tire sidewall between tread shoulder and maximum
section width.
For example: Treadwear 200 Traction AA Temperature A
■Treadwear
The treadwear grade is a comparative rating based on the wear rate of
the tire when tested under controlled 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 depends upon the actual conditions of
their use, however, and may depart significantly from the norm due to varia-
tions in driving habits, service practices and differences in road characteris-
tics and climate.

607
6-1. Specifications
6
Vehicle specifications
GS_HV_U (OM30C81U)
February 1, 2010 11:10 am
■Traction AA, A, B, C
The traction grades, from highest to lowest, are AA, A, B and C, and
they represent the tire’s ability to stop on wet pavement as measured
under controlled conditions on specified government test surfaces of
asphalt and concrete.
A tire marked C may have poor traction performance.
Warning: The traction grade assigned to this 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 highest), 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.
The grade C corresponds to a level of performance which all passenger car
tires must meet under the Federal Motor Vehicle Safety Standard No. 109.
Grades B and A represent higher levels of performance on the laboratory
test wheel than the minimum required by law.
Warning: The temperature grades for this tire are established for a tire that
is properly inflated and not overloaded.
Excessive speed, underinflation, or excessive loading, either separately or in
combination, can cause heat buildup and possible tire failure.

637
Alphabetical index
GS_HV_U (OM30C81U)
February 1, 2010 11:29 am
Switch
Fog light switch..................................... 174
Ignition switch....................................... 150
Light switches.......................................... 171
Mode select switch ............................155
Power door lock switch .................... 55
“POWER” switch ............................... 150
Power window switch........................ 87
Tire pressure warning 
reset switch ....................................... 476
Tire pressure 
warning select switch................... 478
Window lock switch ........................... 87
Wipers and washer switch............. 175
Tail lights
Switch .......................................................... 171
Theft deterrent system
Alarm .......................................................... 101
Immobilizer system ............................. 99
Theft prevention labels ........................104
Tire inflation pressure......................... 596
Tire information
Glossary ............................................... 608
Size ........................................................... 604
Tire identification number ............. 603
Uniform Tire Quality Grading ...606Tires
Chains ..................................................... 234
Checking ...............................................475
Compact spare tire ........................... 561
If you have a flat tire .............560, 570
Inflation pressure ............................... 596
Information ............................................. 601
Replacing .............................................. 560
Rotating tires ........................................ 475
Size ........................................................... 596
Snow tires ..............................................236
Tire pressure warning system .....475
Tools ...........................................................560
Total load capacity ............................... 232
Touch screen .......................................... 242
Towing
Dinghy towing .....................................239
Emergency towing............................524
Trailer towing .......................................238
Traction control ...................................... 214
Transmission
If the shift lever cannot be 
shifted from “P” ................................573
Mode select switch ............................ 155
“S” mode.................................................. 156
Transmission.......................................... 154
Trip meter ................................................... 161
Trunk
Opener ......................................................60
Trunk light ...................................................61
Wattage ..................................................597
Turn signal lights
Replacing light bulbs ......................... 514
Switch........................................................ 158
Wattage ..................................................597
T

644
GS_HV_U (OM30C81U)
January 28, 2010 10:42 am
GAS STATION INFORMATION
Auxiliary catch lever
P. 4 5 7
Trunk opener
P. 6 0
Fuel filler door
P. 9 4
Hood lock release lever
P. 4 5 7Fuel filler door opener
P. 9 4Tire inflation pressure
P. 5 9 6
Fuel tank capacity17.2 gal. (65 L, 14.3 Imp.gal.)
Fuel typePremium unleaded gasoline onlyP. 9 6 , 5 9 0
Cold tire inflation 
pressure
Driving under normal conditions
35 psi (240 kPa, 2.4 kgf/cm2 or bar)
Driving at high speeds above 100 mph 
(160 km/h) (in countries where such speeds 
are permitted by law)
Add 9 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.P. 5 9 6
Engine oil capacity
(Drain and refill)qt. (L, Imp.qt.)
With filter 6.6 (6.3, 5.5)
Without filter 6.2 (5.9
, 5.2)
Engine oil type“Toyota Genuine Motor Oil” or equivalent
Oil grade: ILSAC multigrade engine oilP. 5 9 1