Wheel And Tire Diagnosis: Diagnosis

Symptom	Probable cause	Remedy	Reference
Rapid wear at shoulders	Under-inflation or lack of rotation	Adjust the tire pressure.	For tire inflation pressure, refer to the label on the driver's side center pillar.
Rapid wear at center	Over-inflation or lack of rotation
Cracked treads	Under-inflation
Wear on one side	Excessive camber	Check the camber.	Refer to FRONT WHEEL ALIGNMENT CHECK AND ADJUSTMENT .
Feathered edge	Incorrect toe-in	Adjust the toe-in.	Refer to FRONT WHEEL ALIGNMENT CHECK AND ADJUSTMENT .
Bald spots	Unbalanced wheel	Balance the wheels.	-
Scalloped wear	Lack of rotation of tires or worn or out-of-alignment suspension	Rotate the tires, and check the front suspension alignment.	Refer to FRONT WHEEL ALIGNMENT CHECK AND ADJUSTMENT .