Depends on the course and the type of riding. For the big multi-day events, it's usually slightly above 40 KMH/25MPH.
5s > 175
Race distance / Race time = average speed i.e.: 300 km / 2 hours = 150 kph average.
It was between 35 and 40 kph...
I'll say 140/5 = 28km/hr
Average speed is 40 miles per hour.
185
Cyclists average speed = (total distance of the race)/(time it took him, from starting gun to finish line)
Jeff Gordon was the winner of the 2005 Daytona 500 race. His average speed was 135.173 miles per hour. His qualifying speed for the race was 188.312 miles per hour.
20 miles at 16mph would take 1.25 hours. To complete the race in 2.5 hours, the final 30 miles must be completed in 1.25 hours ie 30/1.25 = 24mph
And just how long was this race? His average speed for the first two minutes of this so called race is 300 meters per minute. Other than that, I am clueless.
Bicycle race
bicycle