Originally Posted by
berner
I ride in the drops now and again, for a mile or so. I like the change of position but don't ride fast enough to get the aero advantage,
Actually you get the aero advantage at all speeds. It's just much more noticable and beneficial at higher speeds. Just cruising along, mYbe half you energy is to overcome wind resistence. When you push really hard, you might be spending 90% for a marginal improvement.