Originally Posted by livedarklions

That's beside the point, the real issue is the reduction in drag figures for the item in question, for example one kind of skin suit vs. tight-fitting clothing. The formula you linked, like all formulas, is clearly vulnerable to gi/go. Manufacturers and marketers have every incentive in the world to make it look like the stuff they're selling has a noticeable effect, so if you use their equipment and methods for measuring the effects of anything including shaving, they may have built-in assumptions that grossly overstate the number being multiplied. You think it's just simple math to verify the .02 reduction figure you used for shaving? I saw that figure given as a result of a wind tunnel experiment done by Specialized, is that where you got it? Obviously, the closer that number is to zero, the less the differential in time at various speeds, so if Specialized's methods err on the high side, that's going to cook things in ways your "simple math" won't detect..