I never heard of them being paricularly flat resistant.They are light tires,and slime like products or liners will defeat the lightness and you will still get flats. Continental Gatorskins,Vredestein Fortezzas, or Specialized Armadillos are known and proven flat RESISTANT tires. What does a tire winning a tour stage have to do with flat resistance anyway.Just more applesauce,as race tires are light weight and made for performance,not flat resistance.Hard to have it both ways.