There’s not necessarily a one size fits all answer here. Depends on the coach and install. We put the Bigfoot auto leveling system on our (now sold) class C. I had the rears installed a little higher on the frame for ground clearance purposes. We backed into a driveway with a slope and didn’t want to risk scraping / damaging them on the way in. Lost a little bit of leveling height but not enough to matter as want to keep rear tires on the ground anyway.