Originally Posted by
Masque
"Developed in the Specialized wind tunnel, the S-Works Aerofly saves ~17 seconds over a 40km distance versus a traditional shallow bend road bar. This time saving comes from the distinct aero shape, reduced tape on the tops, and full internal cable routing."
So, if you had normal round bars with internal routing, and didn't tape the tops, I bet that drops to less than 5 seconds difference.