No flats in over 2,000 street miles running continental grand prix 4000s 700 x 23 @ 105lbs/110lbs, ft/r. Bar none, the best tire I have even run combining light weight, good cornering, supple ride and flat resistance. I love these tires!

Two flats off road on my cross/adventure bike running Ritchey speed max 32's at 40lbs. Both pinch flats hitting rocks on fast descents.