toe-in
Prabably the only way I can think of is to measure tire to tire in front quadrant of tire...then the same on the "back" quadrant of tire. If they are the same, you have 0 toe. Prabably not very easy to do. RPM makes a toe gage that helps do this, but I don't think doing it that way is very accurate. (if you can, measure from the rim and not the rubber tire.