factory rim backspaciing on 3rd gen ???

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im fixing to buy some new rims, and i need to know the backspacing on the 16x7 rims that come on any 4x4 limited... mainly I need to know so I can order a diffrent from stock backspacing so my wheels gain about .5 to 1 inch of inside clearance.... bascaily i want the new wheels tostick out about an inch more then factory