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
Diamant (German bicycle company) poor durability, in 1898 Diamant introduces a new double-roller chain, a design that was to become our modern worldwide standard, now in use on all sorts of machines, from bicycles to motors to industrial machinery. And in 1912, tests the market with a newly-developed the "Damenrad" (ladies' bicycle), a new bicycle frame design for ladies, with a top-tube curving down, allowing to step through, instead of over, the bike. The model is dubbed the "Topas". Sales and demand continued to grow, and production capacity needs to be expanded once again. in 1906 the company goes public to raise capital for