2002 Lexus IS 300 Owners Manual - Page 342

CHASSIS 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. CHECKING AND REPLACING TIRES When to replace your tires SV63009 SV63006 "With the 215/45ZR17 tires for front and the 225/45ZR17 tires for rear Do not perform rotation of the tires, from front to rear or from left to right, or using the spare tire, performing such tire rotation may result in the tires interfering with the body or in uneven wear of the tires, so that steerability of the vehicle is impaired. " 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. 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. 326