Coefficient AR - All Road Drop Handlebar in Black - Coefficient Cycling
Coefficient AR - All Road And Gravel Handlebar - Coefficient Cycling
Coefficient AR - All Road Handlebar rear image - Coefficient Cycling
Coefficient AR - All Road Handlebar front view - Coefficient Cycling
Colby Pearce riding a gravel bike with the Coefficient AR All Road Bar

Coefficient AR (All Road) Carbon Handlebar

The Coefficient AR's unique shape and proportional sizing optimise how riders interact with the front of their bicycle.

We blended volumes of anthropometric and ergonomic data with real-world advice from professional bike fitters and coaches, as well as feedback from professional and amateur cyclists. The result is a better handlebar for better performance.


1 of this size left in stock


If you are shopping in Europe, please visit our International Site.

Ideally Suited For

Literally dozens of prototypes are buried in the Coefficient AR bar boneyard. The Coefficient SWOPE (Slope + Sweep) combine to provide a more comfortable and efficient ride that translates to improved performance, especially on longer journeys.

Materials & Dependability

The Coefficient AR Handlebar is moulded using Toray unidirectional carbon fibre and tested to the highest ISO international standards for professional road and mountain bike racing.

Proportional Sizing Syncs Bar Width & Grip Size

Riders of smaller stature generally have small hands. Proportional sizing is all about the grip diameter of the Coefficient AR's tops.
As you’ll read in the chart, a 38cm bar has a much smaller grip diameter than a 44cm bar.

Proportional Sizing & Specifications

Available Sizes (C to C)38cm40cm42cm44cm
Clamp Diameter31.8mm
SWOPE (sweep+slope)Sweep: 16 degrees  /  Slope: 12 degrees
Flare5 degrees
Drop Width (C to C)40cm42cm44cm46cm
Crown Grip Diameter30mm33mm35mm37mm
Slope Grip Diameter29mm31mm33mm35mm
Clamp Area Width51mm69mm73mm78mm
Weight (grams)225230235240

A video review by Guy Kesteven

Installation Instructions

Download the Installation Guide here.