Operation CHARM: Car repair manuals for everyone.

Tire Wear

New tires should be installed if the wear indicators are exposed or if there is severe shoulder wear. Shoulder wear is usually caused by either excessive camber or excessive toe on tires.

Sometimes incorrect rear toe settings or worn struts will cause severe "cupped" or "scalloped" tire wear on non-driven wheels.

Severely misadjusted rear toe will also cause other unusual wear patterns.