I only had Conti's on one bike a few years ago . I can't remember the model of tire but they were originally very expensive(to me), but they were on clearance at a local bike shop that was closing down . Originally , I think , they were about $70 or so each and I paid $45 for the pair for 700 x 23 . I put them on a Centurion I bought and owned for two years . I rode the heck out of that bike and loved the tires. I think I only got maybe one flat the whole time I owned the bike. The guy who bought the bike took it out for a test ride and came back with the biggest smile on his face and immediately handed me full asking price for the bike. To this day I think the tres helped sell the bike!