[bluecalm]

It's not true at all! Most of the forces you have to overcome when cycling are from air resistance. At around 10mph it's already majority of resistance and at about 18mph it's more than 80%.

This is the reason the best upgrade speed wise for a casual road cyclists are tight clothes. This is also the reason you could be way more efficient if you construct a tear drop shaped vehicle. Illustration from Wikipedia: https://en.m.wikipedia.org/wiki/Drag_coefficient