Tire and Wheel Inspection

Tire and Wheel Inspection





The tires on all new production models have a tire performance criteria (TPC) rating number molded on the sidewall. The TPC rating will appear as a 4-digit number preceded by the letters TPC SPEC on the tire wall near the tire size. A replacement tire should have the same TPC rating.

Tire Wear





1 - Hard Cornering/Underinflation

2 - Incorrect Alignment/Lack of Rotation

3 - Incorrect Alignment/Non-uniform Tire

4 - Heavy Acceleration/Over inflation

5 - Wear Indicator

Inspect the tire and wheel assemblies for the following conditions:

* Unusual wear such as cupping, flat spots, and/or heel-and-toe wear

These conditions can cause tire growl, tire howl, slapping noises, and/or vibrations throughout the vehicle.

* Proper inflation to specifications for the vehicle

* Bulges in the sidewalls

Do not confuse bulges, which are an abnormal condition, with normal ply splices which are commonly seen as indentations in the sidewall.

* Bent rim flanges