Was checking them out on TireRack and I see their weights are quite a bit higher across the board compared to this PDF Phils Tire Service has: https://philstireservice.com/wp-content/uploads/2021/04/Conti-ExtremeContact-Force-Specs.pdfTire Rack has the 315/30-18 at $386. I don’t think anyone pays full price at Track Day Tire, so with discount about $368. A bit higher than the RT660, about even with the Rival S and a bit lower than the A052. I don’t expect them to be as quick as those 3, but hoping for long life. One thing that drives me crazy with Time Trials is making a few hot laps in the morning sessions with sticky tires, and then skipping the afternoon sessions to preserve the sticky tires. Going forward I will run A7’s in the morning and then go HPDE mode with the Contis in the afternoon and run full sessions. All about the seat time.
Please weigh your 315s once they arrive, I'm quite curious what they come out to be.