If you had the F1 SuperCar tires and went to the Proxes 4's did you find that the rears squeal when the rear tires slip while accelerating? Perhaps it will subside after some miles but when the 275/40/20 rears break loose they squeal very loudly and grab the attention of just about eveyone around. I am loving the 2nd gear chirp though! My F1's would not squeal at all. Only have about 100 miles on these Proxes and wanted to see what others have found after they wear in a bit.