Profile Design Subsonic Ergo 39A Aerobar in Black

The Subsonic/Ergo/39a aerobar combines a low stack bracket with the arm-hugging Race armrest to offer an industry-leading fit range oriented towards low, narrow positions.

The Subsonic aerobar system is designed to achieve a lower stack height than standard aerobars, with a clever inline bracket system to minimise the frontal area and reduce drag. This improves aerodynamics and the fit range. The Subsonic bracket brings Profile Design's next generation fit range to a low stack bracket design. This allows the bar to use Profile Design's riser kits to increase the stack without changing the relationship between the armrest and the grips.

The Ergo armrest has been designed to tightly cup the rider's arms, facilitating a narrow position and increasing control at speed. The Ergo armrest shares the flippable design of Profile Design's new generation armrests. By swapping sides or rotating the armrests, smaller increments of movement are achieved, making it simple to fine-tune a rider's position or match the position from their previous aerobar or bike.

The 39a extension offers a comfortable 39-degree angle with an 87mm rise. This is the only low stack clip-on in the market that maintains the pad to grip angle as the bar is stacked up. The extension rotation can be easily adjusted using the shaft bolt. There is a 40mm range of extension length adjustment once the extensions have been cut.

There are 80 distinct position options achievable just by moving the armrests. Combine that with the risers, and this bar offers 1200 possible configurations. As a clip-on bar, it is also possible to adjust the extension width and tilt easily. This is the most adjustable low stack clip-on on the market.

This bar is perfect for riders who wish to achieve lower positions than are possible with standard aerobar designs. Unlike other low stack bars, it allows fine-tuning of the stack height so the rider is not limited to only one armpad height. With the Race armrests fitted, it is tailored towards riders who intend to be low and narrow to punch the smallest possible hole through the wind.

Features:

• Armrest offset: -85mm to -17.5mm in 7.5mm steps
• Armrest Width: 142mm to 272mm in 18.5mm steps (with Extensions at 100mm)
• Armrest Stack: Minimum is 40mm; bracket is compatible with existing risers which add up to 70mm of stack in 5mm increments
• Bracket: Subsonic
• Clamp Diameter: 31.8mm or (26.0 with Shim Kit - sold separately)
• Armrest: Ergo / 10mm Pads
• Extension Length: 340mm
• Width: 142mm to 272mm
• Weight: 590g