Symptom Chart - Tire Wear

WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: For suspension system and additional alignment diagnosis, refer to SUSPENSION SYSTEM - GENERAL INFORMATION article.

Condition	Possible Sources	Action
Inner edge/shoulder wear	Excessive toe out and/or negative camber	Go to Pinpoint Test A Pinpoint Test A .
	Incorrect wheel and tire assembly rotation intervals	Go to Pinpoint Test A .
	High-speed cornering	Go to Pinpoint Test A .
Outer edge/shoulder wear	Excessive toe in and/or positive camber	Go to Pinpoint Test B .
	Incorrect wheel and tire assembly rotation intervals	Go to Pinpoint Test B .
	High-speed cornering	Go to Pinpoint Test B .
Heel/toe wear	Excessive toe in/out Incorrect wheel and tire assembly rotation intervals	ROTATE the wheel and tire assemblies. CHECK the alignment, ADJUST as necessary.
Diagonal wear	Excessive toe in/out	Go to Pinpoint Test C .
	Incorrect tire rotation intervals	Go to Pinpoint Test C .
	Loose, worn or damaged suspension components	REFER to SUSPENSION SYSTEM - GENERAL INFORMATION article.