Originally Posted by
Conanski
All stock Ford wheels have 0 offset which means the hub mounting surface is in the middle of the wheel, so the backspacing is just 1/2 of the total wheel width or 3.75" in your case.
Thanks for that information. But I'm still confused!
I have an offset coversion table from the back of a Wheel Pros catalog, that shows 7.5" rims at 0 offset, 4.25"
8.0" rims at 0 offset, 4.5"
10.0" 0 offset, 5.5"
These measurements all seem to be off by 1/2", or not match how you have just divided by 2.
According to this chart, 7.5" @ 3.75" is -12
I think, like many people, I want to buy aftermarket wheels, that match the factory offset. But these offset/backspace numbers seem like Greek to me!
If I am going to replace my 1990 Ford 15x8's, with aftermarket wheels and want them to fit like stock, what backspace/offset numbers should I be looking for?