First post, just got a 2007 FJ and have a lead on some 17x8 wheels +15 offset with 305/70/17s mounted. I have a ToyTec 3" inch lift on the way and I won't be shy with the BMC but what does concern me is the +15 offset. From the Wheel/Fitment thread, looks like the recommended backspacing is 4-4.5". If my crash course on fitment calculations is accurate, the +15 will result in a backspacing of 3.9 inches of backspacing. I do plan on getting SPC Upper arms as well, will I have issues with this setup or is it something a set of spacers could fix? Looking forward to this project.