About Profile Design SONIC/ERGO/39A Aerobar
The Sonic bracket offers an extensive fit range, low weight and easy adjustment along with minimal frontal area. Combining this with the Ergo armrest creates an aerobar that will aid most riders in optimising their position for both speed and comfort. The 39A is one of the newest versions of Profile Design's reliable aluminium extension range.

Performance
The Sonic/Ergo is designed to present minimal frontal area to create as little aerodynamic drag as possible. The main purpose of an aerobar is, of course, to get the rider into a fast position despite a fairly minimalist appearance the Sonic/Ergo offers a comprehensive fit range for exactly this purpose.

Fit Data
Armrest Offset: -70mm to -17.5mm in 7.5mm steps

Armrest Width: 124mm to 290mm in 18.5mm steps (With Extensions at 100mm)

Armrest Stack:  60mm (no riser kit) to 130mm in 5mm increments (With aftermarket Riser Kit)

Specifications
Bracket: Sonic

Clamp Diameter: 31.8mm (26.0 w/Shims)

Armrest:  Ergo / 10mm Pads

Armrest Width: 124mm to 290mm in 18.5mm steps (with Extensions at 100mm)

Armrest Offset: -70mm to -17.5mm in 7.5mm steps

Armrest Stack: The minimum is 60mm and the bracket is compatible with our existing risers which add up to 130mm stack with (70mm of spacers added)

Construction: 6061-T6 aluminum, pre-drilled for bar-end shifter cable routing

Extension Length: 400mm

Extension Angle: 39 Degrees

Extension Rise: 87mm (bottom to top)

Extension Offset: 15mm total

Outer Diameter: 22.2mm

Inner Diameter: 19.2mm

Shifter Compatibility: Electronic or Mechanical

Color: Anodized Matte Black

Weight: 564g

About Profile Design
Since 1988, Profile Design has been setting the standard in innovation, creating cycling components designed for speed. For nearly three decades, Profile Design has been pushing the limits and making the bold moves to increase cycling performance on the sport’s most captivating stages. Cyclists turn to Profile Design for compelling, detail-oriented products engineered for superior handling, aerodynamics, adjustability and fit. Whether to be first across the line or intrinsically fueled by the allure of competition, athletes worldwide turn to Profile Design, to not only achieve their goals, but to make a lasting statement.