A bicycle handlebar is the steering control for bicycles. It is the equivalent of a tiller for vehicles and vessels, as it is most often directly mechanically linked to a pivoting front wheel via a stem which in turn attaches it to the fork.

What is the use of handlebar?

Handlebars provide a mounting place for controls such as brake, throttle, clutch, horn, light switches and rear view mirrors; and they help to support part of the rider's weight. Even when a handlebar is a single piece it is usually referred to in the plural as handlebars.

What is the standard size of handlebar?

Road Bike – Handlebars generally come in two clamp sizes 26mm (older style) and the newer 'oversized' 31.8mm. The area where you attach the Oi bell will most likely be either 25.4mm or 31.8mm. Mountain Bikes – Handlebars generally come in two clamp sizes 25.4mm (older style) and the newer 'oversized' 31.8mm.