For you guys planning on different rims, i have measured the stock rims, they have a offset of "0", So adding 1 1/2 inch wheel spacers is like a rim with -38mm offset. The point is negative offset moves the tire outward, offset is measured in mm. Bach spacing is ok to use but different rims can have different offset but the same back spacing. So if you find a rim you like and it list the offset, its the best way to understand how much different the tire will sit in/out.