What does the Air density graph show?

This graph displays the Air density in kg per meter cubed (kg/m³).

The changes during a ride are usually caused by a change in temperature and will also depend on the altitude. Generally, it will be closer to 1.15 kg/m³ in the summer and closer to 1.3 kg/m³ in winter.

At a higher altitude, the density will be lower.

As it is an environmental factor, you can't really alter it to improve your performance apart from going to a different venue. From the numbers stated above (1.15 to 1.3 kg/m³), the difference in speed would be around 1 to 2 km/h. Air density does influence performance, but the Notio does not use Air density to get the CdA, it uses air face pressure (detected by a differential pressure sensor - unaffected by air density).

 

In addition, the density of the air picked up by a weather station may be different from that of the local air (especially if tested indoors at a velodrome). Air density depends on temperature, humidity, and barometric pressure.

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