THE POWER YOU NEED TO OVERCOME THE WIND
How hard is that wind making you work? Well, it depends.
Let’s say you’re a 60 kg rider and you want to travel at 25 km/h. Also, let’s assume a coefficient of drag (CDA) of 0.28. You’ll have to pump out about 72 watts to maintain that speed of 25 km/h with no headwind. Into a 6 km/h headwind, your watts have to go up to about 100. Let’s say it gets a bit brisk out with a 25 km/h headwind. Well, you’ll have to work for that 25 km/h with a steady output of about 236 watts. Finally, let’s imagine you can keep things upright in a 50 km/h headwind. Well, great. You’ll have to tap out a steady 520 watts for a 25 km/h speed.