The Subsonic Ergo 39A combines a low-stack Subsonic bracket with the Race armrest to deliver an industry-leading fit range for low, narrow riding positions.
The 39A extension features a comfortable 39-degree angle with 87mm rise, maintaining consistent pad-to-grip geometry as you stack the bar higher—a capability unique among low-stack clip-on aerobars. Subsonic represents next-generation fit engineering in a compact bracket design. Compatible with our riser kits, it lets you increase stack height without altering the relationship between armrest and grips. The Ergo armrest is engineered to cup your arms snugly, promoting a narrow, controlled position at speed while enhancing stability during aggressive riding.
Features
- The Subsonic/Ergo is designed to achieve a lower stack height than standard aerobars, without the added frontal area of a below the basebar extension clamping system. This improves aerodynamics and the fit range.
- The extension rotation can be easily adjusted using the shaft bolt.
- 40mm range of extension length adjustment once the extensions have been cut.
- 80 distinct position options achievable just by moving the armrests. Combine that with the risers and this bar offers 1200 possible configurations.
- Also possible to adjust the extension width and tilt easily. This is the most adjustable low stack clip-on on the market.
- Perfect for riders who wish to achieve lower positions than are possible with standard aerobar designs
Specification
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Bracket: Subsonic
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Clamp Diameter: 31.8mm or (26.0 with Shim Kit - Shim Kit is sold separately)
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Armrest: Ergo / 10mm Pads
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Extension Length: 340mm
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Width: 142mm to 272mm
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Weight: 590g
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Colour: Black
Contents
- 1 x Profile Design Subsonic Ergo 39a Aerobar
