Frequently Asked Questions


Of course! We ship anywhere in the world, with DHL Worldwide Express.

Update 01.11.23:

We have updated our international pricing by removing the flat tax rate from website prices.

For customers outside the UK, this means that you'll now pay 16% less but be responsible for any import tax, duty and handling charges.Please check with your local customs authorities to clarify the exact charges specific to your location. 


The ACS stands for the Aerosensor cycling system, a seamless ecosystem integrating an aerodynamic drag measurement device (Aerosensor), body position sensor (Aerobody), and wireless lap trigger (Aerodrome).

The Aerosensor Cycling System is for cyclists and triathletes of any level looking to gain a decisive advantage on the road and the track.

Absolutely not! Whilst aerodynamic testing is notoriously difficult, we have created the Aerosensor Cycling System to make aerodynamic testing accessible to all.

If you are a tech geek, the beauty of the ACS is you can get as stuck in as you want, all of the data is recorded directly into the FIT file.

Aerosensor can repeat within 0.5% in the velodrome, and 1% on the road, which is comparable to typical wind tunnels.

Currently to use the ACS you will need a Garmin bike computer that can run Garmin Connect IQ applications at a minimum of SDK 3.1.0. This is primarily due to the development possibilities we have with their Connect IQ App.

To find the full list of compatible Garmin bike computers, head here – be sure to check that the device has the “A” symbol, meaning apps.

Note Garmin watches are not compatible currently due to their limited memory and capabilities.

In the future we will expand to other bike computers, such as Wahoo and Hammerhead.  

  • All ACS devices require a Garmin Edge bike computer with API level 3.1.0 or above.  You can find all compatible devices here.
  • Aerosensor requires a quality dual-sided power meter and a magnet-based speed (SPD) or speed/cadence (BSC) sensor.
  • Aerobody requires no external components.
  • Aerodrome requires Aerosensor for use.

Remember that the aero data you get will only be as accurate as the power meter & speed or speed/cadence sensor used.

Data is recorded to FIT file.  You can view the data via various platforms:

  • Aerosensor Excel Analysis Tool
    Automated in-depth analysis in a macro-enabled Excel workbook, available from the downloads section.
  • Aerotune
    Online platform tailored for Aerosensor analysis. See Aerotune website.
  • Garmin Connect
    All Aerosensor data is visible as “Developer fields” on the Garmin Connect website, after your head units has synced.
  • WKO
    Workbook available from downloads section of our website.
  • Golden Cheetah
    We are working with Golden Cheetah developers to better support aero testing. Watch this space!

Head to our support hub here to view the latest aerosensor cycling system manual, troubleshooting guide and useful downloads.

We have a member-only discord group to discuss testing, tips and tricks - you'll recieve all details via email upon purchase or in your Aerosensor account here

You can find the app here on the garmin website.

Aerosensor device

Aerosensor requires the following to operate:

  • ANT+ power meter. Note that single sided crank or pedal power meters are not accurate enough to give good results.
  • ANT+ speed OR combined speed and cadence sensor. Note that this should be a magnet based sensor such as this one. Hub based sensors are notoriously low accuracy so will give poor results with Aerosensor. This is because we need to accurately know your speed at all times.
  • Garmin Edge bike computer with API level 3.1.0 or above.  You can find all compatible devices here.
  • A centrally mounted go-pro mount at the front of your bike. We sell a basic one here but if you are unsure please contact us.

Aerosensor requires a go-pro mount (sold separately here) to attach to, we chose this because there are so many different commercially available options for go-pro mounts.

For more complex setups, such as aerobars (which generally don't have any traditional tube shapes or gaps between the arms) these are trickier but we have found that most aerobars have an off the shelf option for a go-pro mount (especially in the context of certain regulations requiring front bike lights).

We have designed and made purpose-built mounts in the past - although this tends to be a more expensive option.

If you an unsure that your setup will work, please contact us here and we'll be happy to advise.

It is not possible to directly measure the aerodynamic drag of the bike and rider combination. Instead, we measure the power input from the rider, and then subtract:

  • measured kinetic power (power required to accelerate)
  • gravitational power (power required to go uphill)
  • frictional losses (these are relatively small; we used an assumed value)

This leaves the “aero power”, ie the power required to overcome the aerodynamic drag. From this we can easily calculate CdA.

Aerobody device

Aerobody, body position sensor, measures relative position of the rider’s head and chest using a non-contact optical sensor. 

This gives you a live measure of rider position on the garmin bike computer via coloured prompts - white indicates your chosen reference position, blue too low, red too high.

The values are accurate to around 1mm, allowing the cyclist to check that they are maintaining their optimal position throughout their ride.

Aerobody mounts on the stem using a Garmin quarter-turn bike mount (included).

Aerobody can be used on the road, in the velodrome or even in a wind tunnel. 

It can also be used indoors on static trainers, allowing the rider to train in their best aero position no matter the weather.

Aerodrome device

Aerodrome, a wireless lap trigger with a tapeswitch, marks the start and end of each lap with sub-millisecond accuracy and transmits it directly to Aerosensor. 

Knowing where the bike is on the track allows us to account for the influence of bike lean angle on the drag measurement and give a highly repeatable measure of drag from one lap to the next.

Accurate timing can significantly improve Aerosensor's accuracy in the velodrome, giving incredible repeatability.

Aerodrome is designed primarily for the Velodromes (indoor or outdoor).


For several years now we have supplied other industries, from Formula One teams to Truck manufacturers with aerodynamic probes based on our extensive knowledge of aerodynamic testing. Please contact us for details.

Commercial opportunites

Currently we are not offering discounts for bike fitters, however on a case by case basis we will use fitters for distribution and offer preferential rates, please contact us at for more information.

For queries regarding team partnerships and distribution opportunities, please contact us here.