Tire Rub Question

[CobraZb]

I am getting my H&R Race springs installed early next month. But I want to get my BFG's on this week. My question is can I fit an 315 tire with an 18 inch rim with out lowering the car? Will the tire hit the IRS bolt?

 

[Top_Fuel]

What wheel are you using? Are these 10.5" Cobra replica wheels of some sort? What's the width, offset and backspace?

 

[CobraZb]

They are the AFS replica Rims.