] There seems to be a fair amount of internet discussion on the possible link between negative camber on Mazda 3 wheels and what is known as tire cupping. I have experienced severe cupping on the OE Toyo tires at 21,000 miles on a Mazda 3 and am reluctant to get a premium tire to try to override the problem. Tire rotation was first response to the situation, after dealer suggested that tires might benefit from rotation, but stated further that the tires were nearly at the end of their useful lives in any event (which surprised me as I have never gotten such minimal use from a new tire). A trip to the alignment shop came next, resulting in a minor alignment to the rear wheel. None of this decreased the loud tire noise. Some internet comments indicate that a "camber kit" is the only solution to this phenomenon. Any consensus on this issue?