2004 Lexus GS 300 Owners Manual - Page 324

CHASSIS 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 235/45ZR17 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 conditions. NOTICE Low profile tire like 235/45ZR17 may have greater damage than usual tires to its tire wheel when receiving impact from the road surface. Therefore, pay attention to the following. 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 page 280. Avoid driving onto high, sharp-edged objects and other road hazards. Failure to do so can lead to severe tire damage. The effectiveness of snow tires is lost if the tread wears down below 4 mm (0.16 in.). 304