Originally posted by John E
.... Although they do not accelerate as crisply as the Conti Ultra-2000 23s on the Bianchi, I have not noticed any significant difference in rolling resistance.
Our tandem doesn't accelerate very quickly regardless of tires we have.

I wouldn't put them on any of my singles unless I was doing an epic tour. But we do like them on our tandem. Compared to our IRCs, we difinitly felt a difference. It was a smoother, faster ride.