Hi: martin d... The axle lift was added by Reace at Escape!!! We bought the whole rig used, as you see it from the original owners. The truck was their 2002 GMC 4.3 ltr. V6 HD susp OD trans. with a Husky 16 roller hitch. Reace needs to know the height of the box sides from the floor. Ours are 51". The axle to my knowledge was raised 2" by brackets on the frame of the 2007 trailer.
We have had the trailer 1 yr. in May and our best mpg. is 20 at 60 mph. in not too hilly terrain.
escape artist N.S. of Lake Erie