Boy, I wish my car had that much clearance! With the 4.5"BS, I only had 3/4" clearance behind the axle. With the 5" BS, it would have only been 1/4", which I was not comfortable with. Now, with the 5" BS, I have 1/2" clearance.

Each car is likely different, and the tire will also affect it because the widest point of the tire can be a slightly different diameters from manufacturer to manufacturer.