That Boreas I have is about as efficient as I can get it----For me. 15 1/2 lbs- Wheels that stay true and coupled with the tyres roll well- Bars that fit perfectly whether I am in the drops- hoods or on the flats. Brake levers that just fall naturally for the hands and the change levers are just natural. Saddle and 50 milers and I don't even feel it and the crankset is just right on Crankring difference for my cadence and Crank length is perfect. All I have to do is get me working efficiently and it would be perfect.

So why is it that the TCR- that is set up with the same components- same position and setup just doesn't work quite as good?