Will a 15x8 rim fit with a 235/75r15 on stock hight with 4 backspace

 

A 15x8 wheel with 4.5" backspace or zero offset is ideal and does not require the use of a spacer. As an example an LT235/75r15 BFG TA KO2 is listed at 28.8" overall diameter but other tires in that size may be larger or smaller. Whether a wheel/tire combo fits will depend a lot on the specific tire brand/model. All that said it will be close.