TK70HST Hydraulic Sliding Tail (HST) trailer combines the movable wheel area of a sliding-axle trailer with the tail of a hydraulic-tail trailer to deliver both a low load angle and excellent scaleabilty. With the wheels moved forward, the HST's hydraulic tail can be lowered to a 10-degree load angle. This design allows the main hydraulic cylinder to be in the closed position when the trailer is traveling down the road, thereby protecting the cylinder rod from damage caused by debris and the elements. Steel I-beams are constructed of one-piece web and flange material and welded on all four sides to seal and protect the seams from rust. The mainframe is backed by up to a six-year warranty.