Profile Design Sonic Ergo 39a Aerobars | 400 mm

The Sonic/Ergo 39A aerobars combine ultra-lightweight design, extensive adjustability, and optimized aerodynamics to help every cyclist find their ideal balance of speed and comfort. This refined setup features a minimalist, highly efficient structure that reduces frontal area and minimizes air resistance. Comfort, easy adjustment, and peak performance—all in one aerodynamic package.

Key Features:

• 39° Extension Angle: Offers both an aggressive “shrugged” position and a more upright “head-up” posture for improved comfort and control.
• Up to 1500 Configuration Options:
  • Armrest Reach Adjustment: From -70 mm to -17.5 mm (in 7.5 mm increments)
  • Armrest Width Adjustment: From 124 mm to 290 mm (in 18.5 mm increments)
  • Armrest Stack Height: From 60 mm to 130 mm (in 5 mm increments with optional riser kit)
• Quick and Simple Adjustability: Extension length and angle can be adjusted with a single bolt for fast setup changes.
• Ergo Armrests: Ergonomic armrests with reversible and reconfigurable positioning allow fine-tuning or easy transfer from a previous setup.
• Lightweight Sonic Brackets: The lightest brackets from Profile Design, engineered with a simplified design for reduced weight without compromising strength or adjustability.

Tech Specs:

• 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