wheel size LEXUS RX350 2011 Owners Manual

68
*1 : If equipped*2: It also turn on due to natural causes such as natural air leaks or tire inflation pressure
changes caused by temperature (the status of the full-sized spare tire, if equipped, is also checked). Adjust the tire inflation pressure.
See the Owner's Manual
Tu r n s i g n a l i n d i c a t o rRadar cruise control
indicator*1
Headlight high beam indicatorIntuitive parking assist-sensor
indicator*1
Automatic high beam
indicator*1“AFS OFF” indicator*1
Headlight indicator (U.S.A.)Slip indicator
Tail light indicator (Canada)VSC off indicator
Front fog light indicatorEco Driving Indicator Light
“ECT SNOW” indicatorSRS airbag on-off indicator*1
All-wheel drive lock
indicator*1SRS airbag on-off indicator*1
Cruise control indicator
For further information, refer to the Owner's Manual.

79
1-3. Adjustable components (seats, mirrors, steering wheel)
1

Before driving
nPeople suffering illness
Obtain medical advice and wear the seat belt in the proper way.
nChild seat belt usage
The seat belts of your vehicle were principally designed for persons of adult size.
lUse a child restraint system appropriate for the child, until the child becomes
large enough to properly wear the vehicle's seat belt. (→P. 1 2 7 )
lWhen the child becomes large enough to properly wear the vehicle's seat belt,
follow the instructions on P. 75 regarding seat belt usage.
nReplacing the belt after the pretensioner has been activated
If the vehicle is involved in multiple collisions, the pretensioner will activate for the
first collision, but will not activate for the second or subsequent collisions.
nSeat belt extender
If your seat belts cannot be fastened securely
because they are not long enough, a person-
alized seat belt extender is available from
your Lexus dealer free of charge.

236
2-4. Using other driving systems
CAUTION
nWhen the VSC is activated
The slip indicator light flashes and a warning buzzer sounds. Always drive carefully.
Reckless driving may cause an accident. Exercise particular care when the indica-
tor light flashes and a buzzer sounds.
nWhen the TRAC/VSC systems are turned off
Be especially careful and drive at a speed appropriate to the road conditions. As
these are the systems to ensure vehicle stability and driving force, do not turn the
TRAC/VSC systems off unless necessary.
nReplacing tires
Make sure that all tires are of the same size, brand, tread pattern and total load
capacity. In addition, make sure that the tires are inflated to the recommended tire
inflation pressure level.
The ABS and VSC systems will not function correctly if different tires are installed
on the vehicle.
Contact your Lexus dealer for further information when replacing tires or wheels.
nHandling of tires and suspension
Using tires with any kind of problem or modifying the suspension will affect the driv-
ing assist systems, and may cause a system malfunction.

255
2-5. Driving information
2

When driving
Selecting tire chains
Use the correct tire chain size when mounting the tire chains. Chain size
is regulated for each tire size.
Side chain:
0.12 in. (3 mm) in diameter
0.98 in. (25 mm) in length
0.43 in. (10.8 mm) in width
Cross chain:
0.15 in. (3.9 mm) in diameter
1.00 in. (25.3 mm) in length
0.54 in. (13.8 mm) in width
Regulations on the use of tire chains
Regulations regarding the use of tire chains vary depending on location
and type of road. Always check local regulations before installing chains.
nWhen driving the vehicle
Accelerate the vehicle slowly and drive at a reduced speed suitable to the
road conditions.
nWhen parking the vehicle
Park the vehicle and move the shift lever to P without setting the
parking brake. The parking brake may freeze up, preventing it from
being released. If necessary, block the wheels to prevent inadvert-
ent sliding or creeping.

256
2-5. Driving information
nTire chain installation
Observe the following precautions when installing and removing chains:
lInstall and remove tire chains in a safe location.
lInstall tire chains on the front tires only. Do not install tire chains on the rear tires.
lInstall the tire chains on front tires as tightly as possible. Retighten chains after
driving 1 /4 ⎯ 1/2 mile (0.5 ⎯ 1.0 km).
lInstall tire chains following the instructions provided with the tire chains.
CAUTION
nDriving with snow tires
Observe the following precautions to reduce the risk of accidents.
Failure to do so may result in a loss of vehicle control and cause death or serious
injury.
lUse tires of the size specified for your vehicle.
lMaintain the recommended level of air pressure.
lDo not drive in excess of 75 mph (120 km/h), regardless of the type of snow tires
being used.
lUse snow tires on all, not just some wheels.
nDriving with tire chains
Observe the following precautions to reduce the risk of accidents.
Failure to do so may result in the vehicle being unable to be driven safely, and may
cause death or serious injury.
lDo not drive in excess of the speed limit specified for the tire chains being used,
or 30 mph (50 km/h), whichever is lower.
lAvoid driving on bumpy road surfaces or over potholes.
lAvoid sudden turns and braking, as use of chains may adversely affect vehicle
handling.
lSlow down sufficiently before entering a curve to ensure that vehicle control is
maintained.

479
4-3. Do-it-yourself maintenance
4

Maintenance and care
Installing tire pressure warning valves and transmitters
When replacing tires or wheels, tire pressure warning valves and trans-
mitters must also be installed.
When new tire pressure warning valves and transmitters are installed,
new tire pressure warning valve and transmitter ID codes must be regis-
tered in the tire pressure warning computer and the tire pressure warning
system must be initialized. Have the tire pressure warning valve and
transmitter ID codes registered by your Lexus dealer. (→P. 4 8 1 )
Initializing the tire pressure warning system
nThe tire pressure warning system must be initialized in the following
circumstances:
lWhen the tire inflation pressure is changed such as when changing
travelling speed or load weight
lWhen changing the tire size
When the tire pressure warning system is initialized, the current tire
inflation pressure is set as the benchmark pressure.
nThe tire pressure warning system
Your Lexus is equipped with a tire pressure warning system that uses
tire pressure warning valves and transmitters to detect low tire infla-
tion pressure before serious problems arise. (→P. 537, 545)

481
4-3. Do-it-yourself maintenance
4

Maintenance and care
Registering ID codes
The tire pressure warning valve and transmitter is equipped with a unique
ID code. When replacing a tire pressure warning valve and transmitter, it
is necessary to register the ID code. Have the ID code registered by your
Lexus dealer.
nWhen to replace your vehicle’s tires
Tires should be replaced if:
lYou have tire damage such as cuts, splits, cracks deep enough to expose the
fabric, and bulges indicating internal damage.
lA tire goes flat repeatedly or cannot be properly repaired due to the size or
location of a cut or other damage.
If you are not sure, consult with your Lexus dealer.
nReplacing tires and wheels
If the ID code of the tire pressure warning valve and transmitter is not registered,
the tire pressure warning system will not work properly. After driving for about 20
minutes, the tire pressure warning light flashes for 1 minute and stays on to indicate a
system malfunction.
nTire life
lStandard tire over 6 years old must be checked by a qualified technician even if
they have seldom or never been used or damage is not obvious.
lThe compact spare tire could be deformed gradually in the long term even if
you don't use it. Be sure to have the compact spare tire checked by your Lexus
dealer if it is over 5 years.
nIf the tread on snow tires wears down below 0.16 in. (4 mm)
The effectiveness of the tires as snow tires is lost.

482
4-3. Do-it-yourself maintenance
nMaximum load of tire
Check that the number given by dividing the maximum load by 1.10 of the replace-
ment tire is greater than 1 /2 of the Gross Axle Weight Ratings (GAWR) of either
the front axle or the rear axle, whichever is greater.
nTire types
1Summer tires
Summer tires are high-speed performance tires best suited to highway driving
under dry conditions. Since summer tires do not have the same traction perfor-
mance as snow tires, summer tires are inadequate for driving on snow-covered
or icy roads. For driving on snow-covered roads or icy roads, the use of snow tires
is recommended. When installing snow tires, be sure to replace all four tires.
2 All season tires
All season tires are designed to provide better traction in snow and to be ade-
quate for driving in most winter conditions, as well as for use year round. All sea-
son tires, however, do not have adequate traction performance compared with
snow tires in heavy or loose snow. Also, all season tires fall short in acceleration
and handling performance compared with summer tires in highway driving.
3Snow tires
For driving on snow-covered roads or icy roads, we recommend using snow tires.
If you need snow tires, select tires of the same size, construction and load capac-
ity as the originally installed tires. Since your vehicle has radial tires as original
equipment, make sure your snow tires also have radial construction. Do not install
studded tires without first checking local regulations for possible restrictions.
Snow tires should be installed on all wheels. (→P. 2 5 4 )
For the GAWR, see the Certification Label.
For the maximum load of the tire, see the load
limit at maximum cold tire inflation pressure
mentioned on the sidewall of the tire.
(→P. 6 0 9 )

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4-3. Do-it-yourself maintenance
4

Maintenance and care
Wheels
nWhen replacing wheels
The wheels of your vehicle are equipped with tire pressure warning valves and
transmitters that allow the tire pressure warning system to provide advanced warn-
ing in the event of a loss in tire inflation pressure. Whenever wheels are replaced,
tire pressure warning valves and transmitters must be installed. (→P. 4 7 9 )
If a wheel is bent, cracked or heavily corroded, it should be replaced.
Otherwise, the tire may separate from the wheel or cause a loss of han-
dling control.
nWheel selection
When replacing wheels, care should be taken to ensure that they
are equivalent to those removed in load capacity, diameter, rim
width, and inset*.
Replacement wheels are available at your Lexus dealer.
*: Conventionally referred to as “offset”.
Lexus does not recommend using the following:
lWheels of different sizes or types
lUsed wheels
lBent wheels that have been straightened
nAluminum wheel precautions
lUse only Lexus wheel nuts and wrenches designed for use with
your aluminum wheels.
lWhen rotating, repairing or changing your tires, check that the
wheel nuts are still tight after driving 1000 miles (1600 km).
lBe careful not to damage the aluminum wheels when using tire
chains.
lUse only Lexus genuine balance weights or equivalent and a
plastic or rubber hammer when balancing your wheels.

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4-3. Do-it-yourself maintenance
CAUTION
nWhen replacing wheels
lDo not use wheels that are a different size from those recommended in the
Owner’s Manual, as this may result in a loss of handling control.
lNever use an inner tube in a leaking wheel which is designed for a tubeless tire.
Doing so may result in an accident, causing death or serious injury.
NOTICE
nReplacing tire pressure warning valves and transmitters
lBecause tire repair or replacement may affect the tire pressure warning valves
and transmitters, make sure to have tires serviced by your Lexus dealer or other
qualified service shop. In addition, make sure to purchase your tire pressure
warning valves and transmitters at your Lexus dealer.
lEnsure that only genuine Lexus wheels are used on your vehicle.
Tire pressure warning valves and transmitters may not work properly with non-
genuine wheels.