The latest machines don’t clamp onto the edge of the rims anymore but instead use hooks that hold onto the tire on the tread and then you attach them @ 9-3 then roll the car forward to do the compensation. Problem is if the wheels tuck into the wheel wells the clamp hooks will hit the body.
Google the Hunter Hawk Eye system and you’ll see what it looks like.
Ewwwww. You know what my favorite machine was and STILL IS? The Hunter A111. So simple and very accurate as long as it's calibrated. Guys used to tell me "it's not accurate because the wind blows the strings".......well close the door, dummy. lol