2001 Lexus IS 300 User Guide 1 - Page 267

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 SV63006 " 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. 254