Anemoi Aero Extension System

£1,110.00 Sold Out
3 reviews
Compatibility Guide & Technical Resources



Taking our hugely popular custom integrated extension concept and creating "off the shelf" and universally fitting Anemoi carbon fibre aero extensions. 

    Product Description


    A progression of our work carried out with the World Cup winning Huub Wattbike Test Team, the Anemoi aero extensions are the culmination of three years of aero extension development. Key features include:

    - Aerodynamically optimised to provide a clean flow transition from the extension to your forearm, reducing boundary layer separation, turbulence and aero drag.
    - Multiple hand grip options to suit your preferred angle and profile.
    - Fully internal mechanical and electronic cable routing (multiple route options), including internal space for Shimano Di2 5-port junction box.
    - Micro adjustable angled riser; from 10 degrees through to 30 degrees.
    - Universal slotted mount plates to account for differing reaches; long or short (all options can be flipped for increased fitment range). Dual riser stack systems utilise two smaller plates whilst mono riser stack systems utilise a bracket.
    - UCI height category compliant, depending on rider category and handgrip selected.
    - The round handgrip option provides an industry standard 22.2mm diameter pole to accept various bar end plug designs and gear shift systems. Please note if you need to be UCI legal, then installing end plugs and shifters would alter the reference point so you may need to cut down the hand grip section to meet the regulations.
    - Available with Garmin, Wahoo or no mount.
    - 2 piece dual sided or single sided arm rests, slotted to allow width adjustment and supplied with 5mm pre-cut, laser engraved, velcro backed foam padding.
    - Entirely UK designed, optimised and manufactured.
    - Surpasses ISO 4210-5:2014 standard, the safety standard for bicycle steering components.

    To read more about the development and history of aero extensions, check out our Optimisation & Testing blog and our Historical Development blog.

    A full system comprises:

    1x pair of extensions
    1x pair of adjustable angled risers
    1x pair of specified mount plates (if required) or bracket
    1x pair of specified handgrips
    1x pair of 2 piece dual sided or single sided arm rests including foam padding
    1x specified computer mount
    All required mounting hardware, bolts and instructions
    More information can be found on each components page; arm rests, angled risers, mount plates, handgrips and computer mounts.


    Please download our dimension guide before inputting your dimensions into our geometry tool found on the technical resources page. The output will determine the components needed for your specific set up and relevant fit information.

    Once you have decided on your setup you can select the relevant component options from the selection boxes, answering one box will unlock the next round of selection boxes. If you need some assistance, please email us

    With regards to mono riser stack systems. The brackets are available in five different reach sizes from XS (extra short) through to XL (extra long). The size required is determined by your bottom bracket to extension tip and bottom bracket to rear bolt hole dimensions.

    Technical Specifications


    The Anemoi aero extensions have been tested to ISO standard ISO 4210-5:2014, the safety standard for bicycle steering components. They passed. Exceeding the standard by 260% without failure.


    Extension body: 316g
    Arm rests: 125g (dual sided)
    Foam padding: 22g
    Handgrip: 32g (standard pole)
    Adjustable angled riser: 96g
    Mount plate: 120g (mono brackets will weigh more)
    Computer mount: 20g (standard)
    SYSTEM WEIGHT: 731g (pair)

    Customisation Options


    NOTIO BRACKET - We offer two Notio mounting solutions compatible with both the dual riser and mono riser stack systems.

    10MM FOAM PADDING - A pair of 10mm foam padding. The 5mm foam padding also comes as standard with the system.

    MOUNT PLATES - Additional mount plates can be purchased to increase your fitment window.

    REVERSE WEDGES - for UCI set ups only. If you run with a 20 or 25 degree angle then you would need to revert your arm rest angle back to 15 degree to comply with UCI regulations. The reverse wedge reverts the arm rest angle.

    COMPUTER MOUNTS - Various options available

    BTA BOTTLE MOUNT - Dual stack and mono stack/Anemoi base options. Dual stack can be used with the majority of setups whereas the mono stack is strictly only compatible with standard mono brackets and the Anemoi Basebar. Both offer two mounting options. 1) centrally raised above the arm rests to allow for narrow arm rest positions or, 2) out front underneath the extensions.


    Custom mount plates, handgrip styles and angled risers can be manufactured at an additional cost. Please get in touch if you wish to explore these options -

    If you don't see your mono riser mounting system in the selection boxes please get in touch, we can still assist with custom mounting solutions.

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