If your talking about cupping on the edges it has more to do with tread design than alignment. Assuming the alignment is correct. Cross rotating the tires from left to right so they rotate in the opposite direction is the ONLY cure. If done during normal intervals they will stay like new. If the cupping is already severe it will help but the damage has been done. Old theory suggested never to cross radials. This is not true with today's tires. I worked as a dealer tech for 27 years doing alignments. Doug
