Chopped handle bars?

But as you also state, it now became quite clear that the adverse effect of the increased wind resistance was greater than the advantage of better inhalation.

But on "fixies" with narrow flat bars you don't get lower wind resistance, or better inhalation..

Agreed in Copenhagen we have lots of room for bicycles, so narrow bars might be less of an advantage here.. but I just like something like 38cm c-t-c for city riding, and a bit wider on the countryside.