Profile Designs 52ASA Aerobar Extensions (Aluminum) – Ergo Shaped | 340mm & 400mm

The Profile Design 52ASA Aerobar Extensions bring the proven ergonomics of the popular ASC (carbon) extensions into a more accessible aluminum option—without compromising on fit or performance.

Designed using an advanced multi-stage forming process, the 52ASA extensions feature a subtle lateral shift that better aligns with your natural arm position. The result is a more relaxed, sustainable aero posture—helping you stay comfortable and efficient over longer efforts.

These extensions are built around what matters most: fit and rider comfort. By supporting a more natural hand and wrist position, they allow you to settle into your aero position with less tension and better control.

Key Features

• Ergonomic “arm-hugging” shape for improved comfort
• Aluminum construction for durability and value
• Compatible with standard 22.2mm clamp diameter aerobars
• Designed for internal cable routing (rear exit)
• Updated rise to support modern higher-hand positions
• Ergonomic shaped end caps for improved grip comfort

Fit & Performance

Aerobar extensions play a critical role in rider positioning. The right shape and length can improve comfort, reduce fatigue, and help maintain an efficient aero position.

The 52ASA is ideal for riders:

• refining their aero position
• upgrading from straight extensions
• looking for a more natural wrist and hand angle

Available in 340mm and 400mm lengths to suit different fit requirements.

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