It’s a pretty pointless metric as it’s so dependent on terrain and conditions.
so much this.
Average anywhere from 12-25mph depending on length, wind, gravity, solo or group, which is > 100% difference between slowest and fastest.
But as a general set of rules on an average solo rolling Devon ride:
my bimbling speed is 12-15mph
my cruising speed is 15-17mph
my ‘trying’ speed is 17-19mph
my ‘busting a gut’ over short distances speed is 19-25mph
+1-3 mph for group ride
Obviously the shorter and less upwards the ride the nearer the high end of those ranges it is, and the longer and more climby it is the lower.
…to give me something to aim for
Aim for keeping that 23mph average up over a 50mile rolling 5,000ft of elevation. let us know how you get on 😉