Aero basebar width question.

It may be a safe assumption that a 34cm wide base bar- which is very narrow- could potentially have a lower drag coefficient than a 42 cm wide base bar with exactly the same cross sectional shape and aspect ratio.

It may still slow you down though if it changes your handling enough. There has to be a functional component to any aerodynamic consideration. And- while aerodynamics are very important, their significance dwindles when you are grinding up a steep climb for 20 minutes.

Breeza's put down some low drag numbers in wind tunnel tests according to 3T and Cervelo, who have a business relationship where Cervelo provides a great deal of developmental shared data with 3T. They do feel a little... unsure to me on the road. I would use them in a flat triathlon without much cornering, but I might make another choice on a more technical course.