Big Dummy/Big Easy Trailer Hitch Assembly, Black The Dummy Hitch assembly replaces the wheel yoke of your Surly Bill or Ted Trailer and inserts into the horizontal tubes on the non-drive side of your Surly Big Dummy or Big Easy, thereby making it possible to haul your trailer using your cargo bike. Key Features Compatible with Surly Big Dummy and Surly Big Easy (1.0) longtail cargo bikes Not compatible with Big Easy 2.0 Does not fit Big Fat Dummy