Tires Cupping Need Opinions

[B33p3r]

Hello everyone, TB '06. I'm having an ongoing issue with the front tires cupping on the insides. History: Purchased Destination A/t tires from Firestone, had alignment done upon installation. They do a front end check prior to alignment. Months later I notice the fronts cupping. Changed the struts. Still cupping. Bring it back and they check everything out again along with alignment. All in spec. Tech adjusted camber slightly out of spec to compensate for cupping. Still cupping. Bring it to a different, very reputable, mechanic. Called me back tonight and said there is nothing wrong with the front end at all.
I'll be getting an inspection done soon and know these tires will not pass due to cupping on the insides only. At least 1/2 tread on the rest of the tire if not more. I have no issues with getting new tires but don't want to put new tires on only to find out they are going to cup also. Could the problem be the tires themselves? Ideas?

[huey1983]

No i having the same problem with my 07 tb with toyo open country at checked almost every thing still having same problem

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[robertgee]

If you are actualy referring to tires "cupping", as in a scalloping fashion, the problem is either incorrect wheel balance OR a wheel weight has flown off, causing the wheel to be out of balance.

When a wheel is out of balance, it actualy "skips" on the road ..... making contact and breaking contact with road surface, causing the "cupping" that you see.

[navion]

I am having the same problem on a 2003 Bravada. The first set of OE tires lasted about 70,000 miles but had cupped. I replaced the original set with Goodyear Fortera's and after about 30,000 miles I ave the same cupping issue. Thought it might have been worn ball joints as OE are sealed and "maintenance free" as they say. So ball joints were replaced. Just wondering if I am missing something as well. Anyone found any other issues?