1993 Pontiac Trans Sport Owner's Manual - Page 251

Service & Appearance Care Tire Inspection and Rotation (CONT.) I When It's Time for New Tires Buying New Tires Rust or dirt on a wheel, on or -' he parts to which it is fastened, can make wheel nuts become loose after a time. The wheel could come off and cause an accident. When you change a wheel, remove any rust or dirt from places where the wheel attaches to the vehicle. In an emergency, you can use a clothor a paper towel todo this; but be sure to use a scraper wire brush or later, if you need to, to get allthe rust or dirt off. (See theIndex under Changing a Flat Tire.) m m m I One way to tell when it's time for new To find out what kind and size of tires you need, look at the Certification/Tire tires is to check the treadwear indicators, which will appear when o r label. The tires installed on your vehicle y when it was new had a Tire tires have only 2/32 inch (1.6 mm) or Performance Criteria Specification less of tread remaining. (TPC Spec) number on each tire's You need a new tire if sidewall. When you get new tires, get You can see the indicators at three ones with that same TPC Spec number. places around the tire. That way, your vehicle will continue to You can see cordor fabric showing have tires that are designed to give through the tire's rubber. proper endurance, handling, speed The tread or sidewallis cracked, cut rating, traction, ride and other things or snagged deep enough to show cord during normal service on your vehicle. or fabric. If your tires have an all-season tread design, the TPC number will be follow The tire has a bump, bulge split. or The tire has a puncture, or other by an "MS"(for mud and snow). Ifyou cut, ever replace your tires with those not damage thatcan't be repaired well having a TPC Spec number, make because of the sizeor location of the damage. 250