The Sonic bracket delivers an extensive fit range with minimal weight, allowing quick and intuitive adjustments without compromising aerodynamic efficiency.
Paired with the Ergo armrest, this aerobar helps riders dial in their ideal position—balancing speed with sustained comfort on long rides. The 39A represents the latest iteration of our proven aluminium extension line, engineered for reliability and performance across diverse riding styles and body types.
Features
- 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.
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The 39a extensions have a 39° for the grip . The rider can choose whether to hold high for the shrugged position or low for a more open, head up position.
- Extension length and rotation can be easily adjusted using the top bolt.
- Improved shape to integrate with stem steerer tube clamp
- The extension length and rotation can be easily adjusted using the top bolt.
Specification
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Bracket: Sonic
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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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Armrest Width: 124mm to 290mm in 18.5mm steps (with Extensions at 100mm)
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Armrest Offset: -70mm to -17.5mm in 7.5mm steps
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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)
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Construction: 6061-T6 aluminium, pre-drilled for bar-end shifter cable routing
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Extension Length: 400mm
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Extension Angle: 39 Degrees
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Extension Rise: 87mm (bottom to top)
- Extension Offset: 15mm total
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Outer Diameter: 22.2mm
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Inner Diameter: 19.2mm
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Shifter Compatibility: Electronic or Mechanical
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Colour: Anodised Matte Black
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Weight: 564g
Contents
- 1 x Profile Design Sonic Ergo 39a Aerobar
