Prone bicycle

The bottom bracket 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.

[citation needed] The first prone bicycle was developed and marketed by the American company Darling in 1897, but most prone bicycles are do-it-yourself constructions.

In May, 2012, Graeme Obree announced that the bike he was building for his attempt at setting the human-powered vehicle land speed record is a prone bike.

However, he competed in the 2013 World Human Powered Speed Championships in Battle Mountain, Nevada, where the current record was also set.