amdx actually said:

But what is 1/60th of a degree in inches?
That depends on the length.

Following that statement to the logical next step, here is a
representiative track for my sedan from this thread:
http://www.bimmerforums.com/forum/sh...nsion-Overhaul

That photo says that the track is:
- Front Track Width = 1512 mm
- Rear Track Width = 1526 mm

So now what's 1/60th of a degree, in millimeters?