OOH-VAE

The recommended auto-X alignment setting for rear toe is 1/4" to 3/8". How much is that in degrees What is the formula to convert it ?
I did some calculation assuming it's measured at the lip of the rim. That came out to 1.7 degrees equals 1/4 inches. Where are the mathmaticians that teach "trigonometry for autocrossers"

krazik

Search for "toe degrees" in the search this forum box at the bottom. Been discussed many times. The quick and simple answer is deg/2 = inches. Tho the -actual- calculation is more involved than that if you care about 4 digit resolution.

-Ry

E-Z

It's simple math. Numerator divided my denominator.

1/4"
convert to decimal
1 divided by 4 = .25

1/8"
converted to decimal
1 divided by 8 = .125

1/16"
converted to decimal
1 divided by 16 = .0625


Oh BTW, most alignment machines will do both. I say most, buy maybe all as I haven't seen on that doesn't do both.

OOH-VAE

Thanks Krazik, I found the thread that had the formula to calculate the degrees:
sin toe [degrees] = toe [inch] / tire diameter [inch]

For example: 1/4'' = 0.58 degrees

E-Z, I think you should check your alignment Your math is off by factor 2.

E-Z

ahhh.... I guess I misinterpreted your question. LOL

krazik

Like I said. degrees/2 = inch

dnace

thank you finally someone who got it right!!! A lot more invovled than most think.

Davidss

Sorry to bump an dead thread but if you search for "toe degrees" this thread comes up. Just thought I would post a table of toe in degrees and inches for stock S2000 sized tires (24.9 inches) and save people the trouble of busting out the old scientific calculator:

Toe in Inches = Toe in Degrees
1/16 = .14
1/8 = .29
3/16 = .43
1/4 = .58
5/16 = .72
3/8 = .86

Also the above 'simple' formula is a bit off. It is much more accurate with 2.3 instead of 2 as the magic number:
Toe in Inches * 2.3 = Toe in Degrees
Toe in Degrees / 2.3 = Toe in Inches

robrob

This is an old thread but Google brings it up for "convert toe degrees to inches" so I thought I'd link to two calculators I put online. The web page calculators will convert toe inches to degrees and convert toe angle to inches at 1 wheel or total toe for the axle. You input the tire diameter and toe to get an answer:

Convert Toe Inches to Degrees: http://robrobinette....esToDegrees.htm

Convert Toe Angle to Inches: http://robrobinette....eesToInches.htm





The Shop Manual 0.25 inch rear total toe = 0.29 degrees per wheel or 0.58 total rear toe-in with the stock size tires.