1998 Chevrolet Lumina Owner's Manual - Page 280

When It's Time for New Tires One way to tell when it's time for new tires is to check the treadwear indicators, which will appear when your tires have only 1/16 inch(1.6 mm) or less of tread remaining. 0 The tire has a bump, bulge or split. The tire has a puncture,cut or other damage that can't be repaired well because of the size or location of the damage. Buying New Tires To find out what kind and sizetires you need, look of at the Tire-Loading Information label. The tires installed on your vehicle when new had it was a Tire Performance Criteria Specification (TPC Spec) number on each tire's sidewall. When you get new tires, get ones with that same TPC Spec number. That way your vehicle will continue to have tires that are designed to give proper endurance, handling, speed rating, traction, ride and other things during normal service on your vehicle. If your tires have all-season tread an design, the TPC number will be followed "MS" by an (for mud and snow). You need a newtire if any of the following statements are true: 0 0 You can see the indicators three or more places at around thetire. If you ever replace your tires with those not having a You can see cord or fabric showing through the TPC Spec number, make sure they the samesize, are tire's rubber. load range, speed rating and construction (bias, type The tread or sidewall is cracked, cut or snagged deep bias-be1ted or radial) as your ofigind tires. enough to show cord fabric. or 6-42