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Old 07-16-2013, 06:40 PM   #11 (permalink)
bestclimb
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Quote:
Originally Posted by AntiochOG View Post
Thanks for elaborating bestclimb. I am aware of the relationship between scrub radius and wheel offset. However, wouldn't the effect of this only be seen in a dynamic driving situation and not when the car is stationary, i.e. on the alignment rack. The face of the wheel should be parallel to the hub regardless of how much or little it is offset.
You got it. The car is aligned on the rack, or pads or garage floor. The proper amount of toe is put in, then when you are driving down the road the extra (or lack of) scrub radius adds or removes some toe that is not accounted for.

one reason why FWD cars tend to have small scrub radius is the thrust and drag of acceleration and braking can cause a slight toe in under acceleration and toe out while braking.

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