Timothy H.wrote a review of Continental Grand Prix 4000 S II Tire - Clincher on December 8, 2015
Familiarity: I've put it through the wringer
Got the 28mm tires first time around. Super nice rolling tire but the 28mm's barely fit through dura-ace brake calipers. Recommend going with 25mm's. Love these tires. I'm new to the road side of cycling so these are the only road tires I've used, but I rarely get flats. They have great cornering grip and roll fast. Got caught in the rain on one occasion and the tires never slipped. Of course I didn't try to push their limits in the rain but I didn't lose traction.