|  |  | 1873 Monocycle Replica Is a Mechanical and Engineering Marvel gizmodo.com — [PICTURES] This monocycle replica from 1873 is a stunning engineering and mechanical feat. Created by a spaniard using 19th Century documentation and old-style handcrafting techniques, it uses a stunning 6.16-foot wheel, with a 238-teeth inner segment. As you can see in the gallery, the quality of his work is simply amazing.More... (Design) Comments Email Added 2007-08-16 02:30:05 mklopez