tire size LEXUS RX350 2011 Owners Manual

54
General Navigation Commands
To Change the Map Screen,
SAY:
“Map”
“Dual Map”
“Single Map”
“Compass Mode”
To Change the Map Scale/
Size, SAY:
“Zoom In”
“Zoom Out”
“Right Map Zoom In”
“Right Map Zoom Out”
“North Up”
“Heading Up”
“Map Direction”
To C h a n g e t h e M a p
Orientation, SAY:
“Right Map North Up”
“Right Map Heading Up”
“Right Map Direction”
To Change the Guidance
Mode, SAY:
“A r r o w M o d e ”
“Turn List Mode”
“Intersection Mode”
“Freeway Mode”
To Save a Point on the Map,
SAY:“Mark This Point”
To Remove Icons from Map,
SAY:“Clear All Icons”
To Set the Destination, SAY:“Previous Start Point”
To Change the Route, SAY:
“Quick Route”
“Short Route”
“A l t e r n a t e R o u t e ”
“Detour”
“Detour Entire Route”

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.

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.

478
4-3. Do-it-yourself maintenance
Tires
Replace or rotate tires in accordance with maintenance schedules and
treadwear.
nChecking tires
New tread
Treadwear indicator
Worn tread
The location of treadwear indi-
cators is shown by the “TWI” or
“∆” marks, etc., molded on the
sidewall of each tire.
Check spare tire condition and
pressure if not rotated.
nTire rotation
Vehicles with a compact spare tire
Rotate the tires in the order
shown.
To equalize tire wear and extend
tire life, Lexus recommends that
tire rotation is carried out at the
same interval as tire inspection.
Vehicles with a full-size spare tire
Rotate the tires in the order
shown.
To equalize tire wear and extend
tire life, Lexus recommends that
tire rotation is carried out at the
same interval as tire inspection.
Front
Front

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 )

485
4-3. Do-it-yourself maintenance
4

Maintenance and care
CAUTION
nTire pressure warning system operation
The tire pressure warning system may not provide warning immediately if a tire
bursts or if sudden air leakage occurs.
nWhen inspecting or replacing tires
Observe the following precautions to prevent accidents. Failure to do so may cause
damage to parts of the drive train, as well as dangerous handling characteristics,
which may lead to an accident resulting in death or serious injury.
lDo not mix tires of different makes, models or tread patterns. Also, do not mix
tires of remarkably different treadwear.
lDo not use tire sizes other than those recommended by Lexus.
lDo not mix differently constructed tires (radial, bias-belted or bias-ply tires).
lDo not mix summer, all season and snow tires.
lDo not use tires that have been used on another vehicle.
Do not use tires if you do not know how they were used previously.
nWhen initializing the tire pressure warning system
Do not push the tire pressure warning reset switch without first adjusting the tire
inflation pressure to the specified level. Otherwise, the tire pressure warning light
may not come on even if the tire inflation pressure is low, or it may come on when
the tire inflation pressure is actually normal.