Bicycle handlebar a steep U-shape from the base, so that the rider's hands rest above waist-level. This style of bicycle handlebar became very popular in the 1960s after the introduction of wheelie bikes such as the Schwinn "Sting-Ray", Raleigh Chopper, and other highly stylized youth bicycles that imitated the appearance of drag-racing or chopper motorcycles of the day. Legislation in the United States introduced during the 1970s limited the maximum height of manufacturer-installed handlebars to 16 inches above the lowest seat setting; European Union safety regulations use a similar limit of 400mm. The apehanger style remained common in the US through the
Chopper bicycle or 'engine bay', in the frame, in which a motor can be inserted into the frame at a later date, among other tweaks and conversions. Depending on the quality of strength of the frame, and the engines size and output, this can result in blurring between the classifications of bicycle, moped, and/ or motorcycle. Legal laws and statutes may vary in your local state or territory. Chopper bicycle A chopper bicycle is a highly customized bicycle whose design, construction and style is similar to that of a chopper-style motorcycle. While the term "chopper" is generally used to describe a motorcycle