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6-3. Do-it-yourself maintenance
Tires
Replace or rotate tires in accor-
dance with maintenance schedules
and treadwear.
Checking tires
Check if the treadwear indicators are
showing on the tires. Also check the
tires for uneven wear, such as exces-
sive wear on one side of the tread.
Check the spare tire condition and
pressure if not rotated.
New tread
A
Worn tread
B
Treadwear indicator
C
The location of treadwear indicators is
shown by a "TWI" or "
molded into the sidewall of each tire.
Replace the tires if the treadwear indica-
" mark, etc.,
tors are showing on a tire.
When to replace your vehicle's tires
■
Tires should be replaced if:
The treadwear indicators are showing on
●
a tire.
●
You have tire damage such as cuts, splits,
cracks deep enough to expose the fabric,
and bulges indicating internal damage.
●
A tire goes flat repeatedly or cannot be
properly repaired due to the size or loca-
tion of a cut or other damage.
If you are not sure, consult with your Lexus
dealer.
Tire life
■
Any tire over 6 years old must be checked
by a qualified technician even if it has sel-
dom or never been used or damage is not
obvious.
Maximum load of tire
■
Check that the maximum load of the
replacement tire is greater than 1/2 of the
Gross Axle Weight Ratings (GAWR) of
either the front axle or the rear axle, which-
ever is greater.
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.403)
Tire types
■
Summer tires
●
Summer tires are high-speed perfor-
mance tires best suited to highway driv-
ing under dry conditions. Since summer
tires do not have the same traction per-
formance as snow tires, summer tires are
inadequate for driving on snow-covered
or icy roads. For driving on snow-cov-
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