Trailer bike

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This article is about a type of bicycle trailer. For the Girl Scout cookie, see tagalongs.
Side view of a single-speed, seatpost mounted trailer bike
Single speed Half wheeler attached at the seat post

A trailer bike (also known as a trailer cycle, and trademarked names such as Trailerbike, Trail-a-bike, Half wheeler or Tagalong) is a one-wheeled, or sometimes two-wheeled, bicycle trailer designed to carry one or more children in positions that closely resemble that of a bicycle rider. It can be described as the, "back half of a bicycle."[1] The rider of a trailer bike usually has a saddle, handlebars, and pedals. Some fold for more compact storage.

The trailer bike was patented by Canadian entrepreneur Delbert Adams.[2] Adams started the manufacturer of trailer bikes, Trail-a-Bike, and began selling them in the early 1990s,[3] although the same concept had been previously independently and immitatively invented by others at least as far back as the 1930s with the Rann Trailer.[4]

Trailer bikes have come in a variety of configurations. These include upright, bicycle-like configuration, and the seated passenger position as with the Weehoo iGo.[better source needed][5] Trailer bikes may have just one gear or more than one. They seldom have brakes.

A trailer bike is attached to a bicycle at either the seatpost or on a special rear rack by a linkage that allows for pivoting. Alternatively, the hitch mechanism may rotate using the seatpost as the pivot. The attachment may include a quick-release option.[6] Trailer bikes have been available in single-seat and tandem configurations.[7] The Trail-Gator tow bar converts a kid's bike into a trailer bike.[better source needed][8]

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