Abstract: A rack system for vehicles that comprises a rack assembly and an attachment assembly comprising a base member mounted to a vehicle hitch receiver, an inner swing arm having a first end pivotably mounted to the base member, an outer swing arm having a first end pivotably mounted to a second end of the inner swing arm, a rack member pivotably mounted to a second end of the outer swing arm, and locking means for selectively locking the base and rack members together to secure the system in a storage position. The rack assembly is rigidly attached to the rack member. When the base and rack members are locked together, the rack assembly is securely located immediately above and behind the vehicle hitch receiver. When the rack member is unlocked from the base member, the rack assembly may be moved within a movement area defined by the rear of the vehicle and a horizontal, generally circular arc that extends from one side of the vehicle to the other side of the vehicle.