Clearance on the inside is about 3/4". If I would have had the Super Stock springs on the car when I put the rear wheels and tires on, I probably wouldn't have even had to grind the inner lip on the wheel well. They would barely rub if I hit a big bump in the road with the stock /6 rear suspension parts. 4" backspace would have helped too, but then the tire might be too close to the springs.