On my front left wheel my Caster is -0.12* (degrees).
Spec is MIN 1.40* MAX 3.40*

So is this Caster measurement indicating the front left wheel is too far back in the arch?

 

OK after doing a bit of research the Caster is the tilting of the front steering axis either forward or backward from vertical, as viewed from the side of the vehicle.

When the axis is tilted backwards (as it should be within above specs) from vertical, caster os positive. This creates a trailing action on front wheels. When Axis is tilted forwards (i.e wheel too far back within arch), Caster is negative, causing a leading action on the front wheels (i.e. pulling to one side)

 

is there a question for this post?

 

I'm wondering too. Caster is cool. I gots mine at -3.5 on my 4g. Its turn in is much nicer and doesn't make the car any twichyer than before on the highway. I'm thinkin of going to -4 next time.

 

The question is in the first post but I answered it in the second after a bit of searching