Downhill handlebars are the type of handlebars typically used on downhill mountain bikes. They are wider than other types of handlebars, and they usually have a rise to them as well. This rise can vary from a few inches to a foot or more. The width of downhill handlebars can also vary, but they are typically around 24-28 inches wide. Some people prefer downhill handlebars because they give the rider more control over the bike, and they can help to keep the rider in a more upright position.