Originally Posted by
Racing Dan
According to bicyclecalculator the answer is NO (but maybe YES :-)
Riding 100mph in 0mph wind takes 21508w
Riding 50mph in 50mph headwind takes 10754w
However, I can offer no explanation as to why 100 + 0 mph takes so much more power than 50 + 50, when relative wind speed seem to be all that matters. Imo they should be MUCH closer.
Tbh, I have a suspicion its an anomaly/mistake in the calculator.
Coming back to this. Riding at 100 mph against the same relative headwind force takes exactly twice as much power, because Power = Force x Velocity and in this case 100 mph is twice as fast as 50 mph. There is no mistake in the calculator.