This is my fourth set of these tires being used on a fully prepared race car @ 2800lbs with driver and full tank. I've tried Hoosiers and these come in a lot quicker and last longer. After several days last year I added camber to the rear of my car and I'm now at -4.2 front / -3.8 rear. Tire pressure hot at 39psi. Running at Clubmotorsports is easy on tires with no accumulation of rubber and these tires are wearing perfectly with temps across all tires within 5 degrees in to out. Even after 25+ heat cycles they continue to deliver amazing grip. Running with evenly matched cars that are on brand new tires I was able to post equally fast lap times. Even though I run the softer R1S compound they have yet to go out on even the hottest days. These are my default tires and will remain so until something better comes along.