ToyCollector...I was checking the option list for my STINGER 4 post lift and they have a separate 44" long drive on ramp as an 'option' which allows drive on entrance ground clearance for as low as 3" (their standard drive on ramps are 32" which does not allow as low a clearance). perhaps the other mfr's also have extended drive on ramps for improved low ground clearance. see :
www.stingerlifts.com Bill.