Ooh - that will cut gravity from being FIFTEEN times more than aero to only TWELVE TIMES! You wi- No, seriously: this is stupid. And the example I gave was not using only a 5% hill. Which no one would even notice in San Francisco, and is a lot less than the variation you find in "flat" English roads.

No, it doesn't. Some things remain ludicrous beyond comprehension. One of them is saying that a cyclist climbing a steep road at 10mph will have do a major part of his work against air resistance. This. Is. Always. Silly. It isn't even true of a pathetic 5% gradient. Really steep starts at, oh, 10%. And plugging in even 6m/s there we get

[TABLE]
[TR]
[TD="align: left"]Wind Resistance[/TD]
[TD="align: right"] 5.5[/TD]
[TD]kg m/s[SUP]2[/SUP][/TD]
[/TR]
[TR]
[TD="align: left"]Rolling Resistance[/TD]
[TD="align: right"] 5.9[/TD]
[TD]kg m/s[SUP]2[/SUP][/TD]
[/TR]
[TR]
[TD="align: left"]Slope Force[/TD]
[TD="align: right"] 73.5[/TD]
[TD]kg m/s[SUP]2[/SUP][/TD]
[/TR]
[/TABLE]

..So wind resistance won't even noticeable.

(Forces on Rider)

Going over to SF, I once delivered a package on a street with something like a .27 gradient. (Cars can only park at right angles to the road and my bikes front wheel went light!) Imagining that I could climb it at 10mph ( which would take about 1500Watts, and I have to admit is a little beyond my sustained personal best) then

[TABLE]
[TR]
[TD="align: left"]Wind Resistance[/TD]
[TD="align: right"] 5.5[/TD]
[TD]kg m/s[SUP]2[/SUP][/TD]
[/TR]
[TR]
[TD="align: left"]Rolling Resistance[/TD]
[TD="align: right"] 5.9[/TD]
[TD]kg m/s[SUP]2[/SUP][/TD]
[/TR]
[TR]
[TD="align: left"]Slope Force[/TD]
[TD="align: right"] 198.6[/TD]
[TD]kg m/s[SUP]2[/SUP][/TD]
[/TR]
[/TABLE]