One thing I didn't really comprehend is how offset and backspacing relate to rim width. I was concerned with how far the wheels protruded from the cladding. I wanted enough so that when off-roading the tire walls would contact rocks before cladding damage occurred. But I didn't want too much sticking out, this is subjective, what is too much for me is desirable to others. But think of it this way: an 8 inch rim width with a 0 offset will have about 4" of backspace. But a 10 inch rim with 4" of backspace will stick out 2" more than the 8" rim since 5" inches is the rims center point. For some reason I was thinking a 10" rim with the same backspacing as an 8" would stick out only 1 more inch.