Tags are adjustable and should be slightly off the ground when lifted otherwise you are dragging the tire when it should be lifted.
I ran mine over the scales around 5 times fully loaded to adjust the weight on the front, main and tag axles for fairly even distribution within their limits. Instructions were in the owners manual, I have a valve and gauge in the engine compartment that allows me to set the tag pressure.
When I lift my tag I can turn the tire by hand, it is just barely off the ground. My tag requires me to manually lift it for sharp turns, either forward or reverse. If I don't it doesn't turn quite as sharp and drags the tag wheels. My tag is not steerable.
It does automatically low over a certain speed going forward.
HTH
Chris