Abstract: A drag reducer including a frame hinged to the rear of a vehicle and operable between a position adjacent the rear of the vehicle and a position swung away from the rear of the vehicle to allow access to the rear of the vehicle, and an inflatable bag attached to the frame, operable between a deployed inflated configuration and a stowed deflated configuration, the inflatable bag including at least two converging panels defining an aerodynamic drag reducing structure in the deployed inflated configuration.