BTW, there is a difference between the Conti 4000 and the Conti 4000s. In theory at least the s means its their special "chili" rubber material. FYI have about 1500 miles on my Conti 4000 and no flats yet. Heard from LBS dude last week that "the conti salesman came in and said that right now the only difference between the 4000 and the 4000s is the little icon on the side of the tire". So maybe if you get fresh stock 4000 tires they will be the same as the chili aka newer more expensive model.