Originally Posted by Sixty Fiver

Touring over hundreds and thousands of km requires a different type of bicycle than one that is specifically designed for high speed riding... 60kmh is a speed one would attain in a sprint and is not one that can be sustained over any great time or distance.

60kmh is 37mph... extremely fit and strong cyclists can hit this on flat ground.

With the aid of gravity your top speed only depends on the grade, distance, and weight of your balls.