Wheels for a duster offset and backspace

Backspace is NOT measured to the inside lip of the wheel. It's measured from the outside of the lip to the mounting pad. Yes, I realize discount tire direct says otherwise, but they've got it wrong.

Well crud, guess that’s what I get for cutting and pasting from the internet. Thanks for correcting that. :BangHead:

At least I showed it correctly in my sample calculation. :D

Corrected my post above.