The Croozer Designs bicycle trailer hitch is an optional accessory that allows users to extend the bicycle trailer functionality of a Croozer Designs carrier to an additional bike. (Croozer Designs bicycle trailer sold separately) The hitch is a duplicate of the piece that is included with all Croozer Designs child and dog carriers designed as, or in part as a bicycle trailer. Compatible with both nut and quick release configurations, it semi-permanently attaches to the rear axles of a potential towing bicycle. This allows the coupling end of an existing bike trailer drawbar (sold separately) to connect to an additional bike without having to remove the original bicycle trailer hitch. Additional features include, durable welded metal construction, a countersunk mounting hole, two possible mounting positions, and a black powder coat finish with water drainage grooves for protection against rust and corrosion.