While doing research on wheels, there seems to be some misunderstanding of offset vs. backspace. Offset is determined by the width of the wheel and the amount of backspacing. You do not buy wheels based upon offset. You buy wheels based upon the amount backspacing you need, and then the width of the wheel will dictate the offset. For example, 4.5" backspacing will give you a certain offset on a 7" wide wheel vs. a 8" wide wheel. I have included a chart to help depict what I am referring to. Also follow this link to the site to understand how you measure each.
https://www.rsracing.com/tech-wheel.html


https://www.rsracing.com/images/tech-wheeloffset.gif

Thanks for the chart. The problem I have is that I cant or tire stores wont let me try on multiple sets of wheels to find out what fit's best on my truck. I like the virtual wheel/tire software guides but they only show the side view. I wish there was one that showed a rear and front view. That would help out.