Crafted for a new era of cycling, the Coefficient RR Handlebar merges forward-thinking ergonomics with race-winning performance.
30-day returns · 2-year warranty · Crash replacement discount
Why your hands go numb on the bike →
Good quality bar. I like the ethos. Shipping was fine. Wouldn’t recommend running integrated with mechanical shifting. Too many bends makes shifting poor and unusable. Been waiting for customer service to get back to me for return.
Most comfortable handlebars on the market.
Hands never go numb & so many hand positions.
They RR Bars are awesome
Amazing bars very comfortable. A bit difficult to install brake lines!
Bars are super comfortable the swept back position feel very natural.
Description
Both the AR and RR feature Coefficient aero-ergonomics that make it easier to ride faster on the noon ride or an all-day ride. With a deeper drop and increased rigidity, the RR promotes a more aggressive, aerodynamic riding position. Our patented Coefficient SWOPE (sloping, sweeping bar tops) carries over from the AR to relax your upper body and improve respiratory and neuromuscular function.
Sizes Available: 36cm / 38cm / 42cm / 44cm
Clamp Diameter: 31.8mm
Drop: 127mm
Reach: 77mm
SWOPE (sweep+slope): Sweep - 12 degrees / Slope - 15 degrees
Flare: 7 degrees
Drop Width (C to C): 40cm / 42cm / 44cm / 46cm
Stem to Computer (C to C): 87mm
Clamp Area Width: 56mm
Aero Top Grip Width: 43mm / 45mm / 47mm / 49mm
Weight (grams): 310g (36cm) / 315 (38cm) / 320 (42cm) / 325 (44cm)
The Science behind our handlebars
Dive into the science and see real life wind tunnel results that prove why Coefficient handlebars are a game-changer.
Don't just take our word for how good our bars are, listen to professionals within the industry.
Coefficients products are the top choice for professionals across the cycling industry. From elite racers to seasoned mechanics, countless experts rely on our components for their durability, performance, and precision. We're proud to be the trusted brand for those who demand the best from their equipment.
Installation
For a safe and successful installation, it is crucial to follow the instructions in the official install guide.
A good starting point is to match bar width to your shoulder width, so your arms sit in a natural line. From there, a narrower bar is a little more aero, while a wider bar adds leverage and steadier control on rough ground. Take this as guidance rather than a rule; the width that stays comfortable deep into a ride is the right one. The RR comes in 36, 38, 42 and 44 cm widths.
Each Coefficient Handlebar is shipped with comprehensive installation instructions. We recommend that only a qualified bike mechanic install this handlebar. Please follow these installation instructions very carefully. An improperly installed handlebar can lead to damage to the product (nullifying its warranty) or damage to your bike. Downloadable Installation Instructions can be found near the top of the Tech Specs page.
PLEASE NOTE - do not use carbon paste to mount your bar on your stem.
Hex Drive Flat Head Screw with 90° Countersink Angle: M4 x 0.70 mm Thread, 8 mm long.
The pivot/knuckle screw is M5x1x20mm button head. The mounting screws are M4x0.8 flat head.
Bar Fly GoPro-compatible base instructions
If after riding you determine the Coefficient bar is not for you, return it within 30 days of receipt with your receipt for a full refund. Full refunds will only be honoured for handlebars that are returned undamaged, in “like new” condition. Shipping costs are not included in refunds.
Coefficient Cycling warrants each new Coefficient Handlebar against defects in workmanship and materials for a period of two full years from date of purchase. This warranty is strictly limited to the replacement of a defective handlebar. This warranty applies only to the Coefficient bar's original owner and cannot be transferred.
Warranty does not cover normal wear-and-tear, incorrect assembly, or any damage caused by the partnering with incompatible components or attachment of accessories. Warranty does not apply to damage or failure due to accident, abuse, misuse or neglect. In case of handlebar replacement, labor costs for switching handlebars are not covered by the warranty.
Warranty claims must be made through authorised Coefficient retailers or directly with Coefficient Cycling.
Yes we do. Sometimes accidents happen. You might bin it at a crit race or your roof rack has a bad day... we can offer you 30% off a new bar PLUS we'll throw in a new pack of bar tape (if available). Get in touch and we'll issue you a code to use on site.
We ship to most countries. If we are not set up to ship to yours, email info@coefficientcycling.com and we will help. Freight, duty and tax fees may apply.
Shopping in the UK? Visit our UK store: coefficientcycling.co.uk (ships within the UK).
Shopping in Europe? Visit our EU store: coefficientcycling.eu (ships within the EU).
Real people making great products
