Originally Posted by grolby

Sorry, I don't buy 2 mph added to top of Z2. Not really possible to make that determination in the real world (i.e. not on an indoor track), and far outstrips the claims of the manufacturer.

There's no doubt an aero bike IS faster, slightly. So they're interesting for sure. I'd like to try one out. Mostly it's a question of ride and handling for me. Can't help you there.