Glad to pass on my experience . Make sure to pump up the tire pressure up to 80 psi, and the rolling resistance is quite low. The light weight of the Roadster really makes the difference for me!I wondered the same thing as I appreciated the great reviews by PSm and Solliex (thanks you two!!). I did just get a 52cm Roadster on their sale and so far really like it though it's pretty early. I might give my impressions later, but it is a really easy bike to ride. I did think about the Aero. For me it came down to the weight - 32-33# vs 44# - plus the potential of the battery extender. Looking forward to Solliex's ride review on the extender when he gets a chance. I see the Aero is now on back order, it would seem they sold a few so maybe reviews are forthcoming.