Originally posted by RainmanP
Let's get technical and specific. It is generally acknowledged, confirmed through testing, that a cyclist expends up to 30% of his energy pushing the air out of the way
I don't think this is accurate. When rolling at a constant speed of 20mph, I'd have to say about 80-90% goes to air resistance while the rest is rolling.
If air restistance is only 30% what accounts for the other 70%?