MagCAD Specialized Aethos Headset Update Kit - SL7
MagCAD Specialized Aethos Headset Update Kit - SL7

MagCAD Specialized Aethos Headset Update Kit - SL7

Sale price£41.99
SKU: 125510

This item is available for pre-order and has the following estimated shipping date on or before:

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What's Included
  • 1x 5mm headset cap (Aethos top bearing cover).
  • 1x 5mm headset spacer.
  • 2x 10mm headset spacers.
  • 1x 4mm "top" spacer (Tarmac SL7 stem adapter)

The Tarmac SL7 stem and stem cover are pictured for reference only and not included.


This MagCAD headset kit has been a popular request for those wishing to mount the Tarmac SL7 stem to their Specialized Aethos road bike.

This remodelled headset bearing cover and spacers link the integrated design of the Tarmac SL7 to the more rounded shape of the Aethos, improving aesthetics and allowing the use of an integrated computer mount out front for a super clean cockpit. The Aethos has external cables. Therefore this headset kit does not have any provision for internal cable routing.


All MagCAD headset parts are 3D printed in a durable Nylon to ensure they are robust to many years of use. As with any steering related components they should be installed by a competent mechanic and inspected regularly. Incorrect assembly or mis-use may result in damage to the headset components.

The complete headset kit has a total stack height of 34mm, including the "top" Tarmac SL7 spacer. This remains within the maximum recommended headset stack height by Specialized and covers most riders needs.

The minimum stack height, for a "slammed" setup, is 9mm from top of the split compression ring to underside of the Tarmac SL7. See our CAD drawing for more information.

The gap between bearing cover and frame has been carefully refined to minimise water ingress whilst covering variations in split ring dimensions supplied by Specialized. Extra care should be taken to ensure the top bearing cover does not contact the frame once fitted and under compression. 1-1/8 headset shims (not supplied) can be used to increase the gap, if required.

Additional spacers can be purchased separately following the links below:

  • MagCAD Specialized Aethos Headset Update Spacer - 10mm
  • MagCAD Specialized Aethos Headset Update Spacer - 5mm
Compatible With:
  • Specialized Tarmac SL7/SL8 alloy stem.
  • Specialized Aethos road bike.
  • Weight: TBC grams.

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