Max Speed with handheld devices isn't accurate!

Do not trust the Max Speed

Finding max speed using a handheld GPS isn't very accurate. I think the most accurate will be using a cycling GPS like Garmin EDGE 800.

Last year I cycled a trip in Mallorca using a normal GPS. I uploaded the track to Strava.com a couple of months ago, and today I re-uploaded the track. Same information, but look at the Max Speed. Changed from 76.3 km/h to 63.8 km/h. Have Strava done some changes?

Conclusion: Do not trust Max Speed, based on handheld GPS.