The front tires (dunlop sp 9000 215-40-zr 17) with a lot of tread remaining appear to be flat spotted, I suspect due to previous owner storage for about a year at 10psi. About an 1/8th inch from hill to valley. Question is are these salvageable. The tires were re-balanced and so far I don't suspect rim problems and still get vibrations between 65 and 80 mph. Right now I am letting the front wheels sit on layers of carpet at 45psi in hopes of correcting the tire. If tire replacement becomes necessary what recommendations might anyone have. Rear tires are also Dunlop 9000 series.? Also a thought... ever heard of shaving the tire down for correction?