Stan, the steps on my Z1 are always a ways off the ground because it is so high so I have never had an issue with being too close but if the ground were too too close these would not retract much more than about 6 inches (the length of the unit fully closed). These do go out about 10 inches fully extended if the ground was that far. Hope that helps.
2015 ZT252TD Zombie 1
2004 Sierra 2500 HD Tow Beast, 8.1L/Allison 1000
2008 Bombardier 400 2 seater
Twin Ryobi 2200 inverters paralleled for off grid