I hate tire Browning. Also known as tire "bloom", it happens to a lot of new tires and has to do with oxidation etc.… Here's an easy way to get rid of it for years. Use stoners tarminator to get the wheel clean, then rinse it with water, and apply a tire coating. Use an applicator, never spray tire. This is not a tire dressing, this is a true coating, so therefore it lasts 3-6 months....
Before:
Finished
The stuff:
