Originally Posted by grolby

"Nothing to do with grip" is an overstatement, but the point is that you can't look at the TPI of a tire and determine that it has better grip, anymore than you can look at the TPI of a tire and determine that it has lower rolling resistance. With these same tires being perfect illustrations of that fact about Crr. You could certainly make a case that tire suppleness will have consequences for grip, but provided you get your pressure right I don't think it matters much at road pressures. The Schwalbe One has a much stiffer casing than the GP4000S II, but so what? I run it at ~15 fewer PSI and traction isn't a problem. I've scuffed my Speedplays a couple different times with these tires.