Originally Posted by
Darth Lefty
The bottom of the tire is going 0 so it pretty much cancels out.
Jan Heine stated in an article that fenders over the top of the tire confer an aero benefit but I’m not going to Google it right now.
And attaching a samsonsite size handlebar bag is also faster when times with a GPS device once. And steel turns a bike into a plane. Wool is faster. Notice the picture of the fender in Heine's photo, It is as long as an elephant's snout. I have never seen such a snout on a bike in the wild. He also claims really fat tires are faster and I suppose professionals some day will ride 48 mm tires.