Caster effects tire wear as soon as you turn the wheel. I'd guess that'd the steering wheel but I doubt that's what you meant.

Toe mainly effects tire wear when you are driving straight.

So I guess it depends on how much or how often you turn the wheel in comparison to driving straight. I mean the steering wheel, by the way.

I suppose it also means what the definition of "excessive" is also.

You're right and thank you for setting me straight.

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8/2011 X5 xDrive35d Sport, Black Sapphire Metallic, Black Nevada Leather, Fine Burr Walnut Trim
2/2001 M5, Jet Black, Exclusive Complete Black Walk Nappa Point Heritage Leather, Black Cubic Trim