CdA is available on all Strava activities, segment efforts and file uploads that have power meter data.

Add CdA to all of your Strava Activities, start here.

What is CdA?

CdA is drag coefficient multiplied by the area of a moving object. By lowering your CdA you can attain greater speeds for the same power input. Lowering your CdA will also dramatically reduce the affect of the the wind on your speed.