Abstract: A height adjusting mechanism for changing the height of a load supporting portion of a trailer. An axle is rotatably connected to a trailer frame of the trailer for rotation between a towing position and a loading position. The axle has a first portion and a pair of axle shafts that are resiliently mounted with respect to the first portion for rotation over a limited angular range of motion and are biased toward a neutral position. A pair of opposed pivot arms are rotatable in response to rotation of the axle between the towing position and the loading position. The pivot arms are rotatable with the axle shaft of the axle in response to rotation of the axle shaft with respect to the central portion of the axle.