2004 Lexus IS300 tires

CHASSIS
343
Wheel size17 x 7 JJ
Wheel nut torque103 N´m (10.5 kgf´m, 76 ft´lbf.)
NOTE:
For complete information on tires (e.g. replacing tires or replacing wh\
eels), see ºChecking tire inflation pressureº
through ºAluminum wheel precautionsº on page 349 through 371.
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CHASSIS
344
- TIRES AND WHEELS (Type B)Tire size
215/45ZR17
Tire inflation pressure
Recommended cold tire inflation pressure
Front 230 kPa (2.3 kgf/cm2 or bar, 33 psi)
Rear 230 kPa (2.3 kgf/cm2 or bar, 33 psi)
For sustained high speeds above 160 km/h (100 mph), in
countries where such speeds are permitted by law, add 70 kPa
(0.8 kgf/cm
2, 0.7 bar, 10 psi) to the front tires and rear tires, but
never exceed the maximum cold tire pressure molded on the tire
sidewall.
Wheel size17 x 7 JJ
Wheel nut torque103 N´m (10.5 kgf´m, 76 ft´lbf.)
NOTE:
For complete information on tires (e.g. replacing tires or replacing wh\
eels), see ºChecking tire inflation pressureº
through ºAluminum wheel precautionsº on page 349 through 371.
03 07.09

CHASSIS
345
- TIRES AND WHEELS (Type C)
Standard tire:Standard tires
Tire sizeP205/55R16 89V
Tire inflation pressureRecommended cold tire inflation pressure
Front 230 kPa (2.3 kgf/cm2 or bar, 33 psi)
Rear 230 kPa (2.3 kgf/cm2 or bar, 33 psi)
For sustained high speeds above 160 km/h (100 mph), in
countries where such speeds are permitted by law, add the tire
pressure given below to the front tires and rear tires, but never
exceed the maximum cold tire pressure molded on the tire
sidewall.
Sedan 70 kPa (0.8 kgf/cm
2, 0.7 bar, 10 psi)SportCross
SportCross Front: 70 kPa (0.8 kgf/cm
2, 0.7 bar, 10 psi)
Rear: 90 kPa (0.9 kgf/cm2, 0.9 bar, 15 psi)
Wheel size16 x 6 1/2JJ
Wheel nut torque103 N´m (10.5 kgf´m, 76 ft´lbf.)
Compact spare tire (IS300 sold in Canada only):
Tire size
T125/70D17 98M
Tire inflation pressure420 kPa (4.2 kgf/cm2 or bar, 60 psi)
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CHASSIS
346
Wheel size17 x 4T
Wheel nut torque103 N´m (10.5 kgf´m, 76 ft´lbf.)
NOTE:
For complete information on tires (e.g. replacing tires or replacing wh\
eels), see ºChecking tire inflation pressureº
through ºAluminum wheel precautionsº on page 349 through 371.
03 07.09

CHASSIS
350
You should check the tire inflation pressure every two
weeks, or at least once a month. And don't forget the
spare. The inflation pressure for the spare tire should be
adjusted according to the conditions in the table on page
342, 344 or 345.
The following instructions for checking tire inflation
pressure should be observed:
The inflation pressure should be checked only
when the tires are cold. If your vehicle has been
parked for at least 3 hours and has not been driven for
more than 1.5 km or 1 mile since, you will get an accurate cold tire inflation pressure reading.
 Always use a tire pressure gauge. The appearance
of the tire can be misleading. Besides, tire inflation
pressures that are even just a few pounds off can
degrade ride and handling.
 Do not bleed or reduce tire inflation pressure after
driving. It is normal for the tire inflation pressure to
be higher after driving.
 Never exceed the vehicle capacity weight. The
passengers and luggage weight should be located so that the vehicle is balanced.
CAUTION
The inflation pressure for the compact spare tire
must be 420 kPa (4.3 kgf/cm2, 4.2 bar, 60 psi).
Inspection and adjustment procedure
SV63010

1Tire valve
2Tire pressure gauge
1. Remove the tire valve cap.
2. Press the tip of the tire pressure gauge to the tire
valve.
3. Read the pressure using a graduation of the gauge.
4. In case that the tire inflation pressure is not within the
prescribed range, insert the compressed air from the
valve. In case of applying too much air, press the center
of the valve and release the air to adjust.
5. After completing the tire inflation pressure
measurement and adjustment, apply soap water to the
valve and check the leakage.
6. Install the tire valve cap.
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CHASSIS
351
If the gauge and the air pump are not available, have
your vehicle checked by your Lexus dealer.
CAUTION
Be sure to reinstall the tire valve caps. Without the
valve caps, dirt or moisture could get into the
valve core and cause air leakage. If the caps have
been lost, have new ones put on as soon as
possible.
Incorrect tire inflation pressure may waste fuel, reduce
the comfort of driving, reduce tire life and make your
vehicle less safe to drive.
If a tire needs frequent refilling, have it checked by your
Lexus dealer.
CAUTION
Keep your tires properly inflated. Otherwise, the
following conditions may occur and cause an
accident resulting in death or serious injuries.
Low tire pressure (underinflation):
 Excessive wear
 Uneven wear
 Poor handling
 Possibility of blowouts from overheated tire.
 Poor sealing of the tire bead
 Wheel deformation and/or tire separation
 A greater possibility of tire damage from road
hazards
High tire pressure (overinflation):
 Poor handling
 Excessive wear
 Uneven wear
 A greater possibility of tire damage from road
hazards
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CHASSIS
353
1Tire size: For details, see Tire sizeº on page
354.
2DOT and Tire Identification Number (TIN): For
details, see DOT and Tire Identification Number
(TIN)º on page 354.
3Maximum cold tire inflation pressure: This
means the pressure to which a tire may be
inflated. For recommended cold tire inflation
pressure, see Specificationsº on page 342, 344
or 345.
4Load limit at maximum cold tire inflation
pressure: For details, see Checking and
replacing tiresº on page 365.
5Turning indicator: Some vehicles are equipped
with directional tires. For details, see Rotating
tiresº on page 363 or 364.
6Tire ply composition and materials : Plies
mean a layer of rubber-coated parallel cords.
Cords mean the strands forming the plies in the
tire.
7Uniform tire quality grading: For details, see
ºUniform tire quality gradingº that follows.
8Location of tread wear indicators: For details,
see Checking and replacing tiresº on page 365.
9TUBELESSº or TUBE TYPEº: A tubeless tire
does not have a tube inside the tire and air is
directly filled in the tire. A tube type tire has a
tube inside the tire and the tube maintains the air
pressure.
10Radial tires or bias-ply tires: A radial tire has
ºRADIALº on the sidewall. The tire not marked
with ºRADIALº is a bias-ply tire.
11Summer tire or all season tire: An all season
tire has M+Sº on the sidewall. The tire not
marked with M+Sº is a summer tire. For details,
see Types of tiresº on page 362.
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CHASSIS
356
Name of each section of tire
SV63016

1Bead
2Sidewall
3Shoulder
4Tread
5Belt
6Inner liner
7Reinforcing rubber
8Carcass
9Rim lines
10Bead wires
11Chafer
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 vehicles 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 Requirements 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
Tread wear - The treadwear grade is a comparative
rating based on the wear rate of the tire when tested
under controlled conditions on a specified government
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 variations in driving habits, service practices and
differences in road characteristics and climate.
03 07.09