1994 Pontiac Firebird Owner's Manual - Page 219

Service and Appearance Care The tire has a puncture, cut,or other damage that can't be repaired well because of the sizeor location of the damage. When It's Time for New Tires h e way to tell when it's time for new ires is to check the treadwear indicators, vhich will appear when your tires have Inly 2/32 inch (1.6 mm) or less of tread emaining. r'ou need a new tire if: D You can see the indicators at three or more places around the tire. B You can see cord or fabric showing through the tire's rubber. B The tread or sidewall is cracked, cut or snagged deep enough to show corc or fabric. D The tire has a bump, bulge or split. Buying New Tires T find out what kind and size tires you o of need, look at the Tire-Loading [nformation label. The tires installed on your vehicle when it was new had 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 havean all-season tread design, the TPC number will be followed by a "MS" (for mud and snow). If you ever replace your tires with those not having a TPC Spec number, make sure they are the same size, load range, speed rating and construction type (bias, bias-belted or radial) as your original tires. ...Z I U