March 10, 2006
Phil.... Chill.... I do not think they would have sold you wheels and tires that would not fit your truck as long as you gave them all the information.
I am purchasing Centerline wheels. Just so happens on there site they have this FAQ page and it will help you understand some things like what backspacing is.
Basically what this does is it keeps the tires centered on your hub where the manufacturer expects it. You can alter it due to getting wider tires/wheels but it makes steering more difficult and more stress on the spindle and other components. Mine for example when I go to a 10â€ť wheel will be 4.5â€ť backspacing to accomplish this. Actually, I think Ford natural is 4.5" backspacing.
Positive offset means the hub of the wheel is pushed in so the tire will move further out. Negative offset means the hub is moved further out on the wheel making the tire in further. Neg offset means less stress on lugs but possible rubbing of tire on full turn.
0 offset keeps wheels and tire centered on hub.
I know I have a web site here someplace that explains it perfectly. Give me a bit.