Side view of a single-speed, seatpost mounted trailer bike
A single-speed trailer bike from Half wheeler, also 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 in 1987.[2][3] Adams started the manufacturer of trailer bikes, Trail-a-Bike, and began selling them in the early 1990s,[4] although the same concept had been previously independently and imitatively invented by others at least as far back as the 1930s with the Rann Trailer.[5]


Trailer bikes have come in a variety of configurations. These include upright-bicycle-like seating, and recumbent-bicycle-like seating as with the Weehoo iGo.[6] Trailer bikes have been available in single-seat and tandem configurations.[7] Trailer bikes may have just one gear or more than one. They seldom have brakes.

Attachment methods

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.[8]

Conversion sets

The Trail-Gator tow bar and FollowMe Tandem coupling are two products that convert an existing, complete kid's bike into a trailer bike.[9] [10]


See also


  1. ^ "CTC - the UK's national cyclists' organisation: Trailer-cycle". Archived from the original on 2007-09-28. Retrieved 2007-04-01.
  2. ^ United States Patent No. 379,782. Retrieved 2009-10-01.[permanent dead link]
  3. ^ US4756541A - Bicycle trailer - Google Patents
  4. ^ Hammond, Bill (June 5, 1996), "Kids in the 'awkward years' of cycling? Try a trailer bike.", Star Tribune, Minneapolis, Minnesota, archived from the original on March 29, 2015
  5. ^ "CTC - the UK's national cyclists' organisation: Trailer-cycle". Archived from the original on 2007-09-28. Retrieved 2007-04-01.
  6. ^ Linda Bookman (December 19, 2014). "Review: Weehoo iGo Pro child bike seat". Retrieved 2015-06-26.
  7. ^ " Active Passenger Trailers". Archived from the original on 2007-09-28. Retrieved 2007-04-01.
  8. ^ "The Adams Trail-A-Bike! at". Retrieved 2007-04-01.
  9. ^ Lisa. "Trail Gator Trailer Cycle-Review". Two Wheeling Tots. Retrieved 2015-06-26.
  10. ^ Dan Clark. "FollowMe Tandem Review". Simply Propelled. Archived from the original on 2018-04-30. Retrieved 2018-04-29.