I ran 2 sets at 34f and 36r with excellent grip wet, dry, cold, or hot. When I did a trackday on them I would drop the psi to 30-30 recomended by the dunlop rep. I only got 4k miles from the front, and 6k from the rear, though I probably could have eeked a little more out. This set I'm trying at 36f 38r to see if millage improves, but they don't feel quite as good at those psi. Grip is still there though. I ride very hard all the time. Twisties r 5 min from my house, and I don't even take off from stop lights easy. I love to drag knee, and scrap my toe sliders and pegs sometimes. Love these tires, but sometimes wish for a bit more millage. I'm 181 no gear with intiminators and a 636 rear shock