This hub will fit 2012 RAM 1500 4x4 but the wheel studs are a different size. In 2012, Ram switched from 9/16 wheel studs to 14mm wheel studs. The hub will still fit the truck and the wheel will fit the hub, but the lug nuts will not. If you have a 2012 plan to buy lug nuts, your best bet is to find the right part. Everything looked fine except for the wheel hub itself.
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