A prone bicycle is a bicycle which places the rider in a

prone position Prone position () is a body position in which the person lies flat with the chest down and the back up. In anatomical terms of location, the dorsal side is up, and the ventral side is down. The supine position is the 180° contrast. Etymolo ...

. The

bottom bracket The bottom bracket on a bicycle connects the crankset (chainset) to the bicycle and allows the crankset to rotate freely. It contains a spindle to which the crankset attaches, and the bearings that allow the spindle and crankset to rotate. The ...

is located at the bicycle's rear; the rider lies either on a pad or in a hard-shell seat. The prone position of the rider's body can reduce aerodynamic drag and therefore increase the efficiency of the vehicle. It can also be more comfortable or ergonomic than other bicycles. The first prone bicycle was developed and marketed by the American company Darling in 1897, but most prone bicycles are do-it-yourself constructions. There are few series-production models. In May, 2012,

Graeme Obree Graeme Obree (born 11 September 1965), nicknamed The Flying Scotsman, is a Scottish racing cyclist who twice broke the world hour record, in July 1993 and April 1994, and was the individual pursuit world champion in 1993 and 1995. He was known ...

announced that the bike he was building for his attempt at setting the human-powered vehicle land speed record is a prone bike. The attempt was originally to take place in Britain and the current record speed is 82.8 mph. However, he competed in the 2013 World Human Powered Speed Championships in Battle Mountain, Nevada, where the current record was also set. He achieved a speed of 56.62 mph on September 12, 2013.

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Prone bike ''Prone Low-Profile''
Cycle types Road cycles {{vehicle-stub

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