A modular trailer assembly for attachment to a frame of a vehicle includes an elongate support member, a first connector rigidly mountable to the frame of the vehicle, a rear loop, and a second connector. The proximal end of the support member is pivotally connected to the first connector and selectively detachable therefrom. At least one wheel is rotatably connected to the distal end of the rear loop. The second connector includes a first frame member and a second frame member rotatably coupled to one another. The distal end of the first frame is configured to engage the proximal end of the rear loop. The proximal end of the second frame member is configured to engage the distal end of the support member. The first frame member is rotatably moveable to allow cargo to track with the vehicle independently of a change in orientation of the at least one wheel.