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  • Profile Profile Design Cycling / Bike 4a Aerobar Extensions - 400mm

Profile Design Cycling / Bike 4a Aerobar Extensions - 400mm

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Product Descriptions :

Profile Design Cycling / Bike 4a Aerobar Extensions - 400mm

The new range of extensions have evolved from our well proven T-Series.  They have been designed to offer distinct fit options.  We have also adopted a new naming system whereby the name gives the angle material of the extension.  Thus 43a is a 43° bend in aluminium.


The 43a extension offers a ‘wrist relief’ style bend that is intended to allow the extension to hug to the arm for improved aerodynamics without sacrificing wrist comfort.The 43 degree grip angle is based on testing with riders to find a common neutral configuration.

Fit Data

  • The 43a has been designed to offer great ergonomics and cost effective aerodynamic enhancement.

    • Along with the optimized angles it has a 7.5mm per side lateral offset to the grip to allow more options for hand position.


    Profile Design had great success with the T3 extension from our previous range of bars. The 43a is an enhanced version of that popular extension with more precise shaping to follow the riders arm.

    Tech Guide

    • All the extensions have a 22.2mm diameter in the clamping aera.
    • They are designed for cables to be routed out the rear of the extensions so do not have cable exit holes.

    Who is it for?

    The extensions will fit in any aerobar that is designed for 22.2mm.  The 43a extension is a great option for any rider looking for a neutralwrist angle and positioning versatility.

    • Extension Length: 400mm
    • Extension Angle: 43 Degrees
    • Extension Rise: 80mm (bottom to top)
    • Outer Diameter: 22.2mm
    • Offset: 7.5mm
    • Includes: Sold as a Pair (1 Right and 1 Left Extension)
    • Construction: 6061-T6 aluminum
    • Colours: Anodized Matte Black
    • Weight: 110g/pair

    Please read this note before purchasing from us.  We strive to provide quality items at highly competitive prices. All stock sold by us is either held in our warehouse, or in our suppliers’ warehouses. We strive to ensure that stock availability is accurate but we are subject to our suppliers systems which are not always up-to-date. It is for this reason that we say it may take up to 14 days for an item to be delivered to you. Most items are delivered quickly. However, if you require or expect an item to be delivered very quickly, please contact us so that we can make sure that we have it in our own inventory available for immediate dispatch.  Occasionally, due to circumstances beyond our control, a product becomes unavailable usually for a short period of time.  If that occurs we will contact you quickly and discuss with you similar alternate products, or a time for delivery of the product you have purchased, or a full refund. 
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