On Sat, 10 Dec 2016 22:37:01 -0000 (UTC), John Harmon
wrote:

Bill Vanek actually said:

I too am starting to wonder if this guy is nuts, or maybe just a
troll. There is some very simple math involved here.

Hi Bill,

If you can answer this question then it will show that you actually
understand what you call *simple math*.

Here is the question:
https://s23.postimg.org/ajrtf269n/10...toe_angles.gif

Summarized, that says: If total toe is the difference in toe between the
rear and front of the tire, and if the difference in angles between the
rear and the front of the tire are exactly the same (by definition, since
the angle of the wheel/tire combination to the centerline of the car is the
same no matter what size the wheel/tire combination is!), then how the heck
can total toe be specified in degrees?

I replied to your original question days ago, and you ignored that
reply. Regardless of that, your questions have been answered
repeatedly. Toe *is* an angle, but if you know the outside diameter of
the tire, it can also be spec'd in inches, or any other linear
measure. The conversion involves only the measure of sides of a
triangle, which is really basic math. This is my original reply:


Inches depends on the outside diameter of the ti
https://robrobinette.com/ConvertToeDegreesToInches.htm

Minutes to degrees can be found he
http://zonalandeducation.com/mmts/tr.../degMinSec.htm

Regarding the needed accuracy, it depends on exactly what you are
trying to achieve. There is a wide range in camber that will not cause
any meaningful tire wear. Toe is much more critical, including for
overall feel at higher speeds, but you are also dealing with runout,
and there really isn't any good way to adjust for that at home.

The overall point is that even if you are off with the camber, the
tires are not going to be worn out all that much earlier, so close can
be good enough, especially if you bother with rotation. Toe is much
more important, and if you want that exactly right, pay someone to do
it right. You can get it close at home, but it's just luck if it's
exactly right.

You also have to keep in mind that a rear drive car's toe out will
increase with speed, and a front drive car will do the opposite. There
is plenty of slop in steering & suspension, and you will get varied
readings, especially if you are not using turntables. Sometimes trying
to save money is not such a good idea.

At the same time, finding someone to do the job right can be a
challenge, too. There's plenty of hacks out there.

If all you care about is getting things close enough that there won't
be ridiculously excessive tire wear, then have at it. But if you are
trying to get things just right, both for handling and tire wear
purposes, pay someone.