off topic: I've been trying to click on that custom fishing rods link for weeks on your signature but nothing comes up, whats going on with that? I'm a fisherman so always looking for new stuff to try...
You can do the math, measure the radius, that would be the length of the spindle between the center points of the ball joints, multiply that by pi, then divide by 360. That would give, roughly, the linear distance at the top of the spindle, fore or aft, for each degree of caster.
That makes sense. Never thought about it logically..
So for us that aren't good in math, the answer would be....?