Needing a drawbar for your trailer hitch will depend on the reason you are looking for a trailer hitch.
If you are planning on using the Curt Trailer Hitch Receiver, Class I # C11228 to carry a bike rack, you will not need a drawbar. However, to comply with Curt's warranty all non-trailer loads, such as bike racks or cargo carriers, need to be used with a support strap # 18050
If you plan on towing a small trailer with the hitch, you will need a drawbar, also known as a ball mount, like... view full answer...