They've tried 3 times to get them right...somewhere between noticeable and severe vibrations from at least the passenger front, and maybe driver front. You can feel it through the floor and steering wheel shakes. I had real trouble deciding between KO2s (had them on my last three trucks several times over and never an issue/loved them) and KO3s. I figured the new ones 'must' be better. My second time back to try to fix this the salesman noted they (KO3s) were having an issue across the board...Wish I would have known that. They've been balanced & rebalanced. Road force tested. I'm having a hard time convincing myself to go BACK to the shop yet again, but for +/- $1600, not sure I can accept this for 60K miles. When I bought the truck there was one new factory (duratrac) tire on the back and three originals on the rest (30K miles)...drove smooth as butter, but were getting worn, and I drive sand/beach a LOT, so I figured might as well now rather than later.