i am going to call on that tomorrow to see if they will do a custom backspacing in this rim (it is not listed in their catalog. I know I can put a 295/65/15 on an 8 inch rim - at least the manufacture lists that I can (MT Drag Radial) just wondering how much further out the tire will be on my current rim 15x8 4.5 Backspacing with regards to the fender....