1998 TOYOTA 4RUNNER run flat

4RUNNER (1998)
To equalize tire wear and help ex-
tend tire life, Toyota recommends
that you rotate your tires approxi-
mately every 12000 km (7500 miles).
However, the most appropriate tim-
ing for tire rotation may vary ac-
cording to your driving habits and
road surface conditions.
See ºIf you have a flat tireº in Part
4 for tire change procedure.
When rotating tires, check for uneven
wear and damage. Abnormal wear is
usually caused by incorrect tire pres-
sure, improper wheel alignment, out-
of- balance wheels, or severe braking. WHEN TO USE SNOW TIRES OR
CHAINS
Snow tires or chains are recom-
mended when driving on snow or
ice.
On wet or dry roads, conventional
tires provide better traction than snow
tires.
SNOW TIRE SELECTION
If you need snow tires, select the
same size, construction and load
capacity as the original tires on
your Toyota.
Do not use tires other than those
mentioned above. Do not install
studded tires without first checking lo-
cal regulations for possible restric-
tions.SNOW TIRE INSTALLATION
Snow tires should be installed on
all wheels.
Installing snow tires on the front
wheels only can lead to an excessive
difference in road grip capab
ility be-
tween the front and rear tires which
could cause loss of vehicle control.
When storing removed tires, you
should store them in a cool dry place.
Mark the direction of rotation and be
sure to install them in the same direc-
tion when replacing.
Installing snow tires
and chains

4RUNNER (1998)
CAUTION
Do not drive with the snow
tires incorrectly inflated.
Never drive over 120 km/h (75
mph) with any type of snow
tires.
TIRE CHAIN SELECTION
Use the tire chains of correct size.
Regulations regarding the use of
tire chains vary according to loca-
tion or type of road, so always
check them before installing chains.
CHAIN INSTALLATION
Install the chains on the rear tires
as tightly as possible. Do not use
tire chains on the front tires. Re-
tighten chains after driving 0.5Ð1.0
km (1/4Ð1/2 mile).
When installing chains on your tires,
carefully follow the instructions of the
chain manufacturer.
If wheel covers are used, they will be
scratched by the chain band, so re-
move the covers before putting on the
chains.
CAUTION
Do not exceed 50 km/h (30
mph) or the chain manufactur-
er 's recommended speed limit,
whichever is lower.
Drive carefully avoiding bumps,
holes, and sharp turns, which
may cause the vehicle to bounce.
Avoid sharp turns or locked-
wheel braking, as use of chains
may adversely affect vehicle
handling.
Replacing wheels
WHEN TO REPLACE YOUR WHEELS
If you have wheel damage such as
bending, cracks or heavy corrosion,
the wheel should be replaced.
If you fail to replace damaged wheels,
the tire may slip off the wheel or they
may cause loss of handling control.
WHEEL SELECTION
When replacing wheels, care should
be taken to ensure that the wheels
are replaced by ones with the same
load capacity, diameter, rim width,
and offset.
Correct replacement wheels are avail-
able at your Toyota dealer.
A wheel of a different size or type
may adversely affect handling, wheel
and bearing life, brake cooling,
speedometer/odometer calibration,
stopping ab ility, headlight aim, bumper
height, vehicle ground clearance, and
tire or snow chain clearance to the
body and chassis.

4RUNNER (1998)
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 pur-
chasers and/or prospective purchasers
of Toyota vehicles with information on
uniform tire quality grading.
Your Toyota dealer will help answer
any questions you may have as you
read this information.
DOT quality gradesÐAll passenger
vehicle tires must conform to Fed-
eral Safety Requirements in addition
to these grades. These quality
grades are molded on the sidewall.
Treadwear ÐThe 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 char-
acteristics and climate. Traction A, B, C
ÐThe traction
grades, from highest to lowest, are A,
B, and C, and they represent the
tire's ability to stop on wet pavement
as measured under controlled condi-
tions 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)
traction.
Temperature A, B, C ÐThe tempera-
ture grades are A (the highest), B,
and C, representing the tire's resis-
tance to the generation of heat and its
ability to dissipate heat when tested
under controlled conditions on a speci-
fied indoor laboratory test wheel. Sus-
tained high temperature can cause the
material of the tire to degenerate and
reduce tire life, and excessive temper-
ature can lead to sudden tire failure.
The grade C corresponds to a level of
performance which all passenger car
tires must meet under the Federal Mo-
tor Vehicle Safety Standard No. 109.
Grades B and A represent higher lev-
els 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 over-
loaded. Excessive speed, underinfla-
tion, or excessive loading, either sepa-
rately or in combination, can cause
heat buildup and possible tire failure.