I’ve always wondered if the Strava estimated power was close to real power. So on a couple of specific segments I’ve run my phone using Strava and my Garmin using a power meter so that I can compare.
You can see from the screenshots below the differences.
In summary for smaller segments it was within 5%, drifing out to 13% on a 20 minute section, so you would assume it would drift further out for a full ride, something I will try in the near future. Interesting side note that the phone often gave me a second quicker time….
|Segment time||Real Power||Estimated Power||Difference|