by HARDTRAILZ » Wed Apr 15, 2015 12:32 pm
The needed offset will vary by width of the rim. Easier and more consistent to just look at backspacing. Simpler to measure if you are looking at used wheels as well.
Example:
8 inch wide wheel with 4.5 inch Backspacing is 0 offset
9 inch wide wheel with 4.5 inch Backspacing is -12 offset
I hate to advocate weird chemicals, alcohol, violence or insanity to anyone...but
they've always worked for me.