2002 Lexus SC 430 Owners Manual - Page 320

KEYS AND DOORS Before storing radial, snow or studded tires, mark the direction of rotation and be sure to install them in the same direction when using them again. Tires should be stored in a cool dry place. 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. Your vehicle is equipped with 245/40ZR18 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. Riding comfort and road noise with the run-flat tires may be a little worse than that with the standard tires. 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 high aspect ratio tires, etc. 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. The effectiveness of snow tires is lost if the tread wears down below 4 mm (0.16 in.). " 1 New tread 2 Tread wear indicator 3 Worn tread Replace the tires when the tread wear indicators show. The location of the tread wear indicators is shown by the "TWI" or "∆" marks molded on the sidewall of each tire. 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 properly 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 Lexus dealer. 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. CHECKING AND REPLACING TIRES When to replace your tires 63sa02a 307 SC430 through December 2001 Production