Goodyear Hair Cracks In The Outer Diameter Of All 4 Tires

Fine cracks appeared on the edges of the outer diameter of four Goodyear F1 Asymmetric 5 XL FP summer tires. When I sent it to Goodyear for inspection by the company I bought it from, I was told that it was due to irregular wear due to the conditions of use and that there was no manufacturing or workmanship defect. I sent it for cracks in the tires. I think this review was not done properly. When I first bought the vehicle, it had summer Continental tires and I used it for 5 years. I bought Bridgestone tires for winter and used them for 5 years. I am currently using Bridgestone winter tires again. I have never had such a problem with any of these tires.