Before you scream search, I've been doing that for an hour I'm ordering some 18x9.5" wheels and need to double check I'm getting the right spacer. I called skulte today, and they were a tremendous help and recommended a 2" spacer for a +58mm offset wheel. The wheels however I'm ordering are +38mm offset.

So the math I've tried is 10.5/2 = 5.25+38mm = 6.75" backspacing. To get back to the right spec I need 1.25" spacers right? This will get me back to 5.5" backspace all the way around. The reason I used 10.5 above is because the one of the articles I read said wheels measure about an inch wider then they really are which is true. Just making sure that I order the right stuff.

Also since skulte recommended a 2" spacer for a +58, then a +38 (20mm difference is .75") would be 2" - .75" = 1.25"

Thanks
Phyte