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 Designs 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.

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

Tech Guide

Torque settings (all bolts are M6)

• Bar Clamp: 6Nm (53 inlbf)
• Extension Clamp: 6Nm (53 inlbf)
• Armrest Bolts: 4.7Nm (42 inlbf)

Weight

• Bracket: 234g
• Armrest: 130g
• Extensions: 222g/pair
• Total: 586g

Specifications

• Weight: 162g (100mm)
• Length: 70, 80, 90, 100, 110, 120, 130mm (±17°)
• Material: 3-D Forged 6061-T6 Aluminum
• Clamp Diameter: 31.8mm
• Angle: 73° (±17°)
• Steerer Tube Diameter: 11/8in
• Stack Height: 40mm
• Clamp Width: 40mm
• Clamp Tourque: 5Nm
• Finish: Matte Black with White Accents