To be totally honest i don’t understand this at all!
How can it be “cycling” at 100mph when there is a car or whatever ahead of you conveniently pushing all that heavy air out of the way for you?
Why not just do it on a conveyor/treadmill etc?
Or hold you bike and just step out of an aeroplane at 5k feet?
Both will also allow you to “do” 100mph…..