I just wanted to share a little bit of information that I found useful on here. I am not sure who mentioned it, but they mentioned that using "Awesome Cleaner" from the Dollar Tree store and a scrub brush gets tires back to black. I was a bit skeptical but decided to try it today, and I went down and purchased some "Orange Awesome Cleaner" and after soaking the tire for about 30 seconds in the stuff and then scrubbing the tire for another 30 seconds it really did work. So whoever mentioned that...thank you!