For radial tires I have switched to Diamond Back. They were very helpful in giving me exactly what I wanted. I told them the distance from the wheel to the whitewall and the width of the whitewall: 5/8". The WSW don't turn brown because they put a protective layer between the white and the black rubber. My sets of UniRoyals all turned brown and the company was of no help. They know of the issue and refuse to help. There are other muscle/classic car websites that have lots of detail on browning of modern WSW radial tires. For my Concours car the bias-ply Coker WSW tires have never turned brown and still look brand new after 5+ years. That's my experience. By the way, Diamond Back uses the same model of Hankook tire as they put on the Ford Explorer, just a different size of course, so it has had vetting by a major OEM.