Exactly what distance would be relevant for you? The lift is mounted to the ceiling at five points, with two screws required at each of these points. The distance between the screws and the central axis cannot be changed. However, there is probably some "leeway" in the exact position of the four wheels to the back/front or left/right. I may be able to read out the required dimension today, if this is still up to date?! Thank you.

The packaging comes with a template that you have to hold against the centre of the ceiling or beam in the longitudinal and transverse directions. I did not measure the template, I just marked the holes.