^^^This. Air resistance is huge and on my 10mi. summer commute if I needed the trailer it would be the BOB Yak for me. We use our Yak on the back of a tandem and haul 100lbs. (its rated for 70) 15mi roundtrip ever week. If we needed a two wheel trailer we would get one and use it when we needed to really haul stuff. Horses for courses. You don't just have one bike do you?? Do you?

H