>>1576775Trailers generally come with the necessary attachment things. Single wheel trailers usually have a fork type thing on a swivel that attaches to both ends of the rear axle, but ones with a high drawbar that attaches to a ball mount on the seat post exist. Two wheeled trailers either have the same high drawbar with seat post attachment, or a low drawbar that attaches to one side of your rear axle. Low drawbars nearly don't affect bike handling at all, but have a limited turning angle in one direction (usually right), high drawbars that attach to the seat post have a far greater turning angle in either direction but with heavy loads you can kind of feel them tugging on the bike when you lean into turns and they take a little getting used to.
