Toyota land cruiser prado Owner's Manual page 328

The effectiveness of snow tires is lost
if the tread wears down below 4 mm
(0.16 in.).
If you have tire damage such as cuts,
splits, cracks deep enough to expose
the fabric, or bulges indicating internal
damage, the tire should be replaced.
If a tire often goes flat or cannot be prop-
erly repaired due to the size or location
of a cut or other damage, it should be
replaced. If you are not sure, consult with
your Toyota dealer.
If air loss occurs while driving, do not
continue driving. Driving even a short dis-
tance can damage a tire beyond repair.
Any tires which are over 6 years old
must be checked by a qualified techni-
cian even if damage is not obvious.
Tires deteriorate with age even if they
have never or seldom been used.
This applies also to the spare tire and
tires stored for future use.
REPLACING YOUR TIRES
When replacing a tire, use a tire of the
same size and construction, and the
same or greater load capacity as the
originally installed tires. Also, all the
tires must be the same brand and have
the same tread patterns.
Using any other size or type of tire may
seriously affect handling, ride, speedome-
ter/odometer calibration, ground clearance,
and clearance between the body and tires
or snow chains.
CAUTION
Observe the following instructions.
Otherwise, an accident may occur re-
sulting in death or serious injuries.
Do not mix radial, bias belted, or
D
bias−ply tires on your vehicle, as
this may cause dangerous handling
characteristics resulting in loss of
control.
Do not use tires other than the
D
manufacturer's recommended size,
as this may cause dangerous han-
dling characteristics resulting in
loss of control.
With the vehicle stability control sys-
tem—
Do not use tires of different brands,
D
sizes and constructions. This may
damage the drive system and pre-
vent the vehicle stability control
system from functioning correctly.
Never use second−hand tires on your
Toyota.
Using tires whose previous history is un-
known is a risk.
Toyota recommends all four tires, or at
least both front or rear tires be re-
placed at a time as a set.
See "If you have a flat tire" on page 273
in Section 4 for tire change procedure.
When a tire is replaced, the wheel
should always be balanced.
An unbalanced wheel may affect vehicle
handling and tire life. Wheels can get out
of balance with regular use and should
therefore be balanced occasionally.
When replacing a tubeless tire, the air
valve should also be replaced with a
new one.
319