A system for supporting a trailer mover in a fixed spatial relationship to the wheels of a trailer is provided. The system has embodiments handling both independent and non-independent suspension; movers mounted either before or aft the wheels; and, movers mounted on either left hand or right hand wheels. The system attaches to the sprung portion of the trailer suspension to provide the fixed spatial relationship. Adjustable components provide longitudinal and lateral adjustment of the position of the trailer mover to cater for different proximal wheel and suspension geometries.