Lexus SC 430 2004 Manual page 364

If an air loss occurs while driving, do not continue driving
with a deflated tire. Driving even a short distance can
damage a tire beyond repair.
Any tires which are over 6 years old must be
checked by a qualified technician even if damage is
not obvious.
Tires deteriorate with age even if they have never or
seldom been used.
This also applies to the spare tire and tires stored for
future use.
NOTICE
D When you purchase new tires, consult your
Lexus dealer. If you change from run-flat tires
to standard tires, a spare tire should also be
purchased.
D When the tires must be repaired or replaced,
have them repaired or replaced by Lexus dealer
or authorized dealer. The tire pressure sensors
will be affected by the installation or removal of
tires.
D When the tires must be replaced, replace the
grommets for tire pressure sensors as well.
Tire selection
When replacing a tire, use a tire of the same size and
construction, and the same or greater maximum
load capacity as the originally installed tires.
Using any other size or type of tire may seriously affect
handling, ride, speedometer/odometer calibration,
ground clearance, and clearance between the body and
tires or snow chains.
Check that the maximum load of the replaced tire is
greater than 1/2 of the Gross Axle Weight Ratings
(GAWR) of either the front axle or the rear axle,
whichever greater. As for the maximum load of the tire,
see the load limit at maximum cold tire inflation pressure
mentioned on the sidewall of the tire, and as for the
Gross Axle Weight Ratings (GAWR), see the
Certification Label. For details about the Certification
Label and sidewall of the tire, see pages 300 and 333.
CHASSIS
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