I'm going in for an alignment today, and in anticipation of the shop asking me to what specs I would like my car aligned, I decided to research factory specs and then research best-practices from various owners.
I realized the some folks quote toe in mm, some quote toe in inches, and some in minutes and degrees. I didn't feel like doing all the trigonometry to convert back and forth (which varies w.r.t. wheel diameter) so I found some slide-rule-era charts to help with the conversion.
Note that toe quoted in degrees is constant, whereas toe quoted in length (mm or inches) changes w.r.t. wheel diameter because the location of the wheel lip in space (x,y,z) changes w.r.t. wheel diameter for a fixed circumference. Consequently, there's no fixed constant one can use to multiply by to convert toe quoted in relative angles to toe quoted in length.
Anyways I found these charts super useful ---- especially as some shop equipment give printouts in length (Coats?) , and some shop equipment gives printouts in degrees (Hunter?)
I realized the some folks quote toe in mm, some quote toe in inches, and some in minutes and degrees. I didn't feel like doing all the trigonometry to convert back and forth (which varies w.r.t. wheel diameter) so I found some slide-rule-era charts to help with the conversion.
Note that toe quoted in degrees is constant, whereas toe quoted in length (mm or inches) changes w.r.t. wheel diameter because the location of the wheel lip in space (x,y,z) changes w.r.t. wheel diameter for a fixed circumference. Consequently, there's no fixed constant one can use to multiply by to convert toe quoted in relative angles to toe quoted in length.
Anyways I found these charts super useful ---- especially as some shop equipment give printouts in length (Coats?) , and some shop equipment gives printouts in degrees (Hunter?)
