Abstract: One embodiment of a trailer of the present invention includes a longitudinal member with a coupling assembly secured to the longitudinal member at one end and wheels secured to the longitudinal member at another end. The coupling assembly includes a first portion connectable to a vehicle so that when connected, the first portion is rotatable relative to the vehicle about a first axis that is approximately perpendicular to a ground surface below the vehicle. The coupling assembly further includes a second portion connected to the first portion and the longitudinal member. The second portion is rotatable relative to the first portion about a second axis. The second portion is further configured so that the longitudinal member is rotatable relative to the second portion of the coupling assembly about a third axis.