downhill racers (dirt tracks with jumps and drops) will rip it up at over 100km/hr, imagine what one could do on the streets going downhill. I'ver personally seen someone going down the gravel on the side of the cut in n van out racing cars, thought that was pretty sweet to see.I've seen cyclists go down Mt. Baker at least 70-80 km/hr. . . .although thats downhill.
I've been been clocked over 80km/h on the street with knobby tires. Easily reached over 100km/h on my roadbike. Although these are downhill. Straight, you can keep 50 km/h easily.i dont think thats real. no one can ride a bicycle that fast, and did u see how fast he accelerated between the trucks dont think so.