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Tall bike
A tall bike is an unusually tall bicycle often constructed by hobbyists from spare parts. Typically, two conventional bicycle frames are connected, by welding, brazing, or other means, one atop the other. The drive train is reconfigured to connect to the upper set of pedals, and the controls are moved to the upper handlebar area.
Alternatively, a bicycle can be built by inverting the frame, and inserting the fork from the 'wrong side', flipping the rear wheel, and adding a long gooseneck and tall handlebars, then welding a long seatpost tube to the 'bottom' (now the top) of the frame. This type of tall bike is made with only one bike frame, and is often called an ''upside-down bike'' rather than a tall bike, though the seat can be quite high, depending on the frame shape used. This type can be somewhat safer, as there is less tubing between the rider's legs and dismounting in a hurry can be easily accomplished.
Finally, a tall bike frame can be made from scratch.
== Practical uses ==
Tall bikes are usually used for recreation and entertainment, but can be used for general transportation also. Regular tall-bike commuters note that both their increased visibility and the simple 'wow factor' give them a safety advantage in automobile traffic over 'short bikes.'〔(Chicago Magazine, July 2006, page 58 )〕〔Chicago Tribune, May 19, 2005, At Play section, page 1〕 However, there are issues with mounting and dismounting similar to those presented by penny-farthings.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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