1993 Buick Park Avenue Owner's Manual - Page 276

The tire has a puncture, cut, or other damage that can't be repaired well because of the size orlocation of the damage. .\ CAUTION: Buying New Tires To find out what kind and size of tires you need, look at the Tire-Loading Information 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 tohave tires that are designed to giveproper endurance, handling, speed rating, traction, ride and other things during normal service on your vehicle. If your tires have an 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. Xing tires could cause you to lose control hile driving. If you mix tires o different sizes or b types (radial and bias-betted tires;), the vehicle may not handleproperly, and youcoutd have a crash. Be sure to use the same size and type tires on all wheels. with your compact spare, It's all right to drive bbugh. It was developedfor limited use on your Uniform Tire Quality Grading The following information relates to the system developed by the United States National Highway Traffic Safety Administration which grades tires by treadwear, traction and temperature performance. (This applies only to vehicles sold in the United States.) Treadwear The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified government test course. For example, a tire graded 150 would wear one and a half (1