Originally Posted by
ctak
My Aeroad with di2 and 60mm DT Swiss carbon hoops at 17.9-lbs = 12-14s slower up a 1.9 mile local climb than my S-Works Roubaix weight weenie build at 15-lbs. Not a huge margin, but I definitely prefer the feel of the Roubaix for hilly stuff. I'm no pro, so the marginal performance gains from aero is purely for entertainment.
This is an interesting data point and it speaks to the paradox I had pondered previously: when you're riding the segment, you may not feel (or miss) that 12s time difference, but you'd definitely feel the subjective difference of the lighter bike. And that may be why weight matters to so many of us despite what the speed/power data show.