handlebar

A handlebar is a rigid bar that forms the main control and grip surface on many vehicles, most notably bicycles and motorcycles. It is connected to the steering mechanism and provides a handhold for the rider, as well as a mounting point for controls such as brakes and shifters. The term is also used in other contexts, including a distinctive style of facial hair known as the handlebar moustache and, more generally, any bar-like grip used for control.

Bicycle handlebars are attached to the fork steerer via a stem and can take several shapes. Road bikes often use drop bars, which curve downward to place the hands in a lower, more aerodynamic position. Mountain bikes use flat or riser bars for an upright posture and added leverage, while other designs such as bullhorn or aero bars are chosen for specific riding styles and aerodynamics. Materials include steel, aluminum, carbon fiber, and titanium, with choices balancing strength, weight, and stiffness.

On motorcycles, handlebars are typically larger and mounted to the upper triple clamp or fork tubes. They provide the primary control surface for steering and hold the throttle, brake, and clutch levers, as well as switchgear. Bar widths, rise, and pull influence rider leverage, control precision, and posture, and various configurations cater to different riding styles and ergonomic preferences.

Handlebar moustache is a facial hair style characterized by long, curved ends that resemble bicycle handlebars. It has appeared in various eras and cultures, often associated with a retro or flamboyant aesthetic. The term can also be used more loosely to describe any long, curved mustache.