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