On a traditional upright bicycle, the body weight rests entirely on a small portion of the sitting bones, the feet, and the hands.
As with upright bicycles, most recumbents are rear wheel drive.
Advocates cite a number of advantages over traditional upright bicycles.
This is particularly advantageous if the upright bicycle is next to a curb or similar object.
Although recumbent bicycles are generally considered safer than upright bicycles , they do have some specific safety issues.
This scenario, although very rare, can create severe spiral fractures of the femur rarely seen with upright bicycles.
For an upright bicycle on dry asphalt with excellent brakes, pitching will probably be the limiting factor.
A bicycle saddle, often called a seat, is one of three contact points on an upright bicycle, the others being the pedals and the handlebars.
In one, only upright bicycles are permitted; this is administered by the UCI.
The retronym "upright bicycle" is used to distinguish the style from recumbent bicycles.