Originally Posted by
redlude97
This depends on your tuck. If you are talking about the same position that you use to put out 250w sure, but if you instead choose to sit on the top tube, grab the tops, level the feet, and coast I bet you could maintain the same speed on a 10% downhill grade. The pros do it all the time
Not sure exactly how that relates to the discussion at hand, but you could probably take the Superman position and then go faster (at obviously zero power output).
dave