This digital document is a step-by-step guide to aero testing in a velodrome using the Notio aerometer. It details the pre, during, and post testing protocol, to produce reliable and usable results. Equipment requirements and screenshots are included to help streamline the process and prevent unnecessary mishaps on the day of testing.

Why aero test

Being able to quantify the aerodynamic efficiency of a cyclist is hugely valuable when searching for performance gains. It allows you to compare the aero contributions of certain equipment choices or positions. You can then make informed decisions to steer your setup choices.

In a world where every aspect of performance is measured and analysed, it would be naive to ignore the effects of aerodynamic drag. At high speeds (50+ kph) approximately 90% of your power is used to overcome aerodynamic drag (Grappe et al., 1997). Every scenario yields different results, but to use an example of a certain athlete riding at 50kph, reducing CdA by 5% can result in a power saving in the ballpark of 16 watts.

Why create the guide

We recognise the challenges posed by the laborious and at times slow-paced nature of aero testing as demonstrated by our inhouse experimentation with aero testing processes. In response to this, we took all our learnings and designed this resource to help guide and streamline the process for others. Every time we do on track aero testing, the document acts as a benchmark process to keep our aero validation process consistent.

What is in the guide

Crafted as a result of our engineering internship program, the guide is the culmination of insights, experimentation, and a commitment to knowledge sharing in the cycling aerodynamics space. It breaks down the process into manageable steps, from equipment requirements to setting up the testing environment and interpreting the results. It is designed to eliminate unnecessary complexities and avoid mistakes that will impair the results.

Who is it for

This guide is directed towards performance focused end of the cycling spectrum who seek validation on equipment or setup decisions. Whether you're a seasoned racer, a mechanic, or a cycling enthusiast eager to spend some time optimising your setup, our guide caters to you.

Summary

As the cycling world evolves, so will this guide. Expect updates to keep you at the forefront of cycling aerodynamics, including more online tools that relates CdA to power output.

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