Designed for gravel racers who refuse to compromise between speed and control, the PRO Discover Aero Carbon Handlebar pairs an aerodynamic flat-top section with 12-degree flared, compact drops. At 44cm wide with a 4-degree forward sweep, you get a stable, confident grip in the drops on rough terrain without sacrificing an aero tuck on the open road or fast gravel.

Highlights

• Aero-shaped tops: Flat, wing-profile tops (40mm deep, 17mm thick) cut frontal area so you spend less energy fighting the wind on long gravel days.
• 12-degree flared drops: The drops widen your stance by approximately 4cm at the ends, giving extra leverage and stability when the surface turns rough or technical.
• 4-degree forward sweep & downward slope: Angles the wrists naturally and keeps the tops comfortable during extended time in the aero position.
• UD T700 carbon with Dyneema: The reinforced carbon layup absorbs high-frequency vibration from rough roads and gravel, helping reduce hand and arm fatigue.
• Di2 integration: Dedicated holes for Di2 electronic shifting controllers, so your cockpit stays tidy with Shimano GRX Di2 or other Di2 groupsets.
• Compact geometry: 100mm drop and 72mm reach keep the controls easy to reach from the hoods or the drops, suiting a wide range of rider proportions.

Construction & design

The tops are shaped with a flat, forward-sloping profile that provides a broad, stable hand position. Dyneema fibres are woven into the UD T700 carbon layup to improve impact resistance and dampen road buzz — delivering a smoother feel without compromising stiffness where it matters. External cable grooves run the full length of the bar, giving you the option of a clean, tape-wrapped run for your cables and hoses.

Geometry

The 44cm width is measured centre-to-centre at the tops (at the hoods). With 12 degrees of flare and a 4-degree forward sweep, the drop ends sit approximately 4cm wider than the tops, which is a noticeable stability benefit on loose or wet gravel. The compact 100mm drop keeps you out of a deep, aggressive position, while the 72mm reach suits riders coming from endurance road or gravel backgrounds.

Compatibility & fit

Fits any stem with a standard 31.8mm bar clamp. External cable grooves accommodate mechanical or electronic shift cables and brake hoses, with dedicated Di2 junction/controller ports at the drop ends. Compatible with the PRO Compact Carbon Clip-On aero extension. This is the 44cm width in black, weighing 285g.