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These equations are for recreation only.

This is assuming the track infrared beams are at 1 5/8" height and the checking wheel is 22 diameter"
Input the track's actual data if known.

If the front wheels have a stagger in them, add that stagger to the roll out.
(dragsters usually have stagger for example)

Roll Out Calculator

Wheel Checking Height: inches
Stage Beam Height: inches
Car Tire Height: inches
Input DATA Please