Most if not all 700c tires > 38 are city/hybrid/touring/off road tires. They are built to be better in one or more other areas but not ultra low rolling resistance like what is available in the < 32 size . As time goes on, more features other than "it's a great bullet proof city tire" are working their way into larger 700c sizes. I personally like Conti SpeedRides in 700x42 (except no tubeless) but what I want in a tire might not be what someone else wants. Like what others mentioned, just because a tire is a slick or has minimal tread, it is big or small etc doesn't mean it will roll with less effort than something else. It might be smooth but that is not the same as rolling resistance.
Last edited by u235; 03-12-18 at 07:57 AM.