Hey Orangebullit,
I don't know how accurate of a measurement you are looking for, but I measured from the back of the door to certain of axle and came up with 29" (inches) it is not an easy measurement because the rear wheel well sticks out so far. The other measurement from bottom of window to center axle is 22 1/2" inches....take note, that this measurement will very drastically from car to car depending on how the car is set up for ride height. Again, this measurement was not easy to take either, so both measurements are not exact.
I hope this helps