Most of the folks I ride with are larger than I am; it's safe to say that some are almost twice the man I am. They all fuss that they never get any help when trying to draft on me. That makes me think that my small size (66kg and 175cm) gives me an inherent aerodynamic advanatage.

They'll all get away from me on a good downhill, though.

Then, as we go though the bottom of the hill and start up the other side I'll catch them pretty quick. That may be because I pedal more going down and through the bottom, so I'm pedaling on the uphill well before they are.

So what's going on?