Lexus GS430 User Manual page 576

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The tires on your Lexus have built−in tread wear

indicators to help you know when the tires need

replacement. When the tread depth wears to 1.6 mm

(0.06 in.) or less, the indicators will appear. If you can

see the indicators in two or more adjacent grooves, the

tire should be replaced.

Vehicles equipped with 245/40R18 93Y or

P245/40R18 93V tires: Your Lexus has been fitted with

specially developed tires which provide exceptional

dynamic performance under general road conditions.

However your riding comfort may worsen a little and

road noise may increase during driving. You may also

notice that your tires will wear more rapidly and tire grip

performance will be reduced on the snowy and/or icy

roads when compared to standard tires. Be sure to have

snow tires or tire chains on the snowy and/or icy roads

and drive carefully with the speed appropriate for road

Low profile tire like 245/40R18 93Y or P245/40R18

93V may have greater damage than usual tires to

its tire wheel when receiving impact from the road

surface. Therefore, pay attention to the following.

D Be sure to use with proper tire inflation

pressure. If the tire inflation pressure is low, the

tire may have greater damage. For detailed

information about tire inflation pressure, see

D Avoid driving onto high, sharp−edged objects

and other road hazards. Failure to do so can

lead to severe tire damage.