CURT Trailer Hitch Receiver Adapter Reducer, 2-1/2 to 2-Inch, 34-In Extension, 4,500 lbs Model 45048*CURT Trailer Hitch Receiver Adapter Reducer, 2 1 2 to 2 Inch, 34 In Extension, 4,500 lbs Model 45048 CURT hitch adapters can be used for many different purposes when hitching up a trailer. Whether a ball mount shank is too small or too large to fit into a receiver tube, a CURT adapter can make up the difference. Our adapters are built with exceptional strength and designed to be precisely fitted for their application. We carry trailer hitch adapters