Profile Design Sonic/Ergo/52a Aerobar

The Profile Design Sonic/Ergo/52a Aerobar is a highly adjustable clip-on aerobar designed to help riders achieve an aerodynamic and comfortable riding position for time trials, triathlon, and fast endurance riding. Built around the lightweight Sonic bracket system and the supportive Ergo armrests, this aerobar offers exceptional fit flexibility and easy adjustability.

The 52a extensions feature a 52° grip angle that promotes a natural wrist position and allows riders to adopt either a compact aerodynamic posture or a slightly more open position for improved comfort on longer rides. The extensions are constructed from durable 6061-T6 aluminium and are pre-drilled for clean internal routing of bar-end shifter cables.

The Sonic bracket provides a wide adjustment range for armrest width, stack and reach, making it easy to fine-tune your position. Combined with the reversible Ergo armrests and optional riser kits, the system offers hundreds of fit configurations to dial in your ideal aero setup.

Designed for road bikes with a 31.8mm handlebar clamp, the Sonic/Ergo/52a is a versatile upgrade for riders looking to improve aerodynamics and efficiency without committing to a full time-trial cockpit.

Key Features

• Highly adjustable clip-on aerobar system

• 52° ergonomic extension angle for a natural wrist position

• Sonic bracket system for extensive fit adjustment

• Ergo armrests with 10mm pads for comfort and support

• Compatible with mechanical or electronic bar-end shifters

• Internal cable routing compatible

• Durable 6061-T6 aluminium construction

• Ideal for triathlon, time trial, and endurance riding

Technical Specifications

Brand
Profile Design

Model
Sonic / Ergo / 52a Aerobar

Material
6061-T6 Aluminium

Clamp Diameter
31.8mm (26.0mm with included shims)

Extension Length
400mm

Extension Angle
52°

Extension Rise
87mm

Extension Offset
15mm

Armrest
Ergo Armrest with 10mm Pads

Armrest Width Adjustment
124mm – 290mm (in 18.5mm steps)

Armrest Offset
-70mm to -17.5mm

Armrest Stack Height
60mm base (up to approx. 130mm with optional risers)

Compatibility
Electronic and mechanical bar-end shifters

Weight
Approx. 564g

Colour
Matte Black

Optimised Aerodynamic Position

The Sonic/Ergo/52a is designed to help riders reduce aerodynamic drag while maintaining comfort and control. With extensive adjustment options and a refined ergonomic design, it allows riders to precisely dial in their aero position for maximum efficiency and speed.