Backspacing and Offset - the never ending headache of wheel shopping

I prefer backspace. Offset seems to confuse people. Measure what you have and how much space you have left. That will get you very close to what works on your car unless you mess with too big of tires on too narrow of a rim. Like my 255-60's are just about too wide for my 7" wheels. The sidewalls bulge out and are close to rubbing.