Average speed - indications
Most cyclists can achieve 10-12 mph average very quickly with limited training. More experienced, short-medium distance (say 20-30 miles): average 15-16 mph. Reasonable experience, medium (say 40 miles): average around 16-19 mph.
What is a good average speed for a beginner cyclist?
Bearing in mind all the factors above many beginner cyclists ride at an average speed of 10-14mph. Even though it is possible to sustain a higher speed, 10-14mph is the average most beginners can sustain in the beginning. Athletes coming from other sports such as running can usually hold between 15-18mph.
Is 20km/h fast cycling?
20km/h (12.4 mph) - many "occasional" cyclists ride around this speed. 25km/h (15.5 mph) - most commuters. 30km/h (18.6 mph) - fast commuters, slower roadies.