Abstract: A load-bearing system configured to rotatably support heavy cargo loads supported from a vehicle is provided. The system includes a pivot platform coupled to the vehicle and having first and second swing arms pivotably mounted to the pivot platform, each swing arm having a first end coupled to the pivot platform and a second end coupled to a mounting platform, the mounting platform rotatably mounted to the second ends of the first and second swing arms and designed to permit attachment thereto of one or more cargo carriers to support cargo, and a locking assembly coupled to the vehicle. The locking assembly pivotably adjusts to a first position to lock the mounting platform into a first position against the vehicle. The locking assembly pivotably adjusts to a second position to unlock the mounting platform and permit rotation of the mounting platform away from the vehicle.