Originally Posted by jrennie
If I weight in at 71kg and another guy is 68k but we average the same wattage and have the same air displacement then he would be faster, no?
VERY minor, probably more minor than Dr.W's analytic cycling result, as I presume analytic cycling scales aero drag as a function of mass. On flats, you'd get a tiny boost from very slightly less rolling resistance, and you'd get a couple of seconds from acceleration at the start/turnaround.