You can go even faster with some effort! The other day I was frequently hitting well over 50kph, maxing out around 62kph (30-38mph) and I was trying to conserve energy. It's a hell of a lot of fun. I'm not even that fast or fit - any half decent bike will absolutely fly on a good descent.

https://www.strava.com/activities/954036327 (Shows top speed recorded by my GPS)