There are a few tubesets in the world that I drool over and one is Columbus Air. This proprietary tubeset has been used in time trial and road bikes for decades and when detailed properly can be mind-numbingly gorgeous. This Pinarello is a classic example of how Air brings a whole nother level of classiness to an already Beautiful Bicycle.
Check out the side shot below.
You’d never know from looking at the profile right? Gorgeous.
I could not find a photo credit for these, so if you know, please shoot that info my way!