Coefficient RR Carbon Road Handlebar

Coefficient RR Carbon Road Handlebar

$687.00 CAD

$687.00 CAD

(127 reviews)
Coefficient AR Carbon Gravel Handlebar

Coefficient AR Carbon Gravel Handlebar

$615.00 CAD

$615.00 CAD

(9 reviews)

Ergonomic Carbon Road Bike & Gravel Handlebars

Ergonomic road bike handlebars

Coefficient builds road bike handlebars around one idea: a hand position that stays comfortable for hours. Our SWOPE shaping sweeps and slopes the bar tops to sit your wrists, arms and shoulders in a more natural position, with several places to rest your hands so you can change your grip on a long ride.

The range starts with two carbon drop bars. The RR (Road Race) is the road-focused bar Ian Boswell rode to win the 2021 Unbound Gravel 200, and the AR (All-Road) adds extra flare for gravel and mixed-surface riding. Both share the same SWOPE sweep-and-slope geometry and Coefficient's focus on validated, rider-tested design over marketing claims. New to drop bars, or fighting numb hands on long rides? Our guide to why your hands go numb when cycling covers what actually helps. Whether you race on the road or spend your weekends on gravel, this is where to start if you want a cockpit that stays comfortable mile after mile.

Choosing your Coefficient bar

Treat the two as points on one spectrum rather than separate categories. The RR ($478, in 36, 38, 40, 42 and 44cm) is the firmer, road-leaning bar, with the gravel record to prove it can do both: Boswell's Unbound win came on the RR. The AR ($428, in 38, 40, 42, 44 and 46cm) is the more compliant, gravel-leaning bar; Cyclingnews called it notably floaty next to the more solid RR. Both suit road and gravel, so choose by ride feel and where you ride most.

At a glance	RR (Road Race)	AR (All-Road)
Price	$478	$428
Widths	36, 38, 40, 42, 44 cm	38, 40, 42, 44, 46 cm
Ride feel	Firmer, road-leaning	More compliant, gravel-leaning
SWOPE tops	12 degrees of rearward sweep and 15 degrees of downward slope on both
Pedigree	Ian Boswell won the 2021 Unbound Gravel 200 on it	Built for gravel and mixed surfaces, quick on the road too

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. On the AR, proportional sizing pairs narrower widths with a slimmer top grip for smaller hands.

Both bars are molded from Toray unidirectional carbon, but shape is what separates them from conventional road bike handlebars. Where a standard drop bar runs straight across the tops, the SWOPE tops sweep back and slope down so your hands sit at a more natural angle. road.cc found the sloping, backswept shape removed the uneven wrist stresses of a conventional bar on long seated climbs, and reported great shock absorption from the RR on the hoods.