sentences:  Legislation in the United States introduced during the 1970s limited the maximum height of manufacturer-installed handlebars to 16 inches (40.64 cm) above the lowest seat setting; European Union safety regulations use a similar limit of 40cm.The ape hanger style remained common in the US through the mid-1980s, and is still frequently seen on lowrider bicycles.Recumbent bicycles, due to their wide variety, are often equipped with handlebars seen nowhere else.