Trailer Hitch Ball Shank Size and Use of Hitch Adaptrers on a 2010 Toyota Prius

Expert Reply:

Class 1 receiver hitches use a 3/4 inch ball shank size. I would recommend item # 19256, for a 1-7/8 inch ball for your hitch or the item # 19258, 2 inch ball.

1-1/4 inch to 2 inch Trailer Hitch adapters like the Hitch Adapter 1-1/4 inch to 2 inch Trailer Hitch Receiver, item # HTAD, are not to be used for towing because the use of an adapter significantly reduces the tongue capacity of the trailer hitch and puts excess stress on the hitch if used for towing due to the extended length from the vehicle. The adapter will most likely not break but the weakest component in the system, vehicle, hitch, ball mount, ball or adapter, will most likely bend or cause safety issues.

expert reply by: Bob G