I've got the 33 10.5 15 on american racing baja's with a 3.75 backspace. 3.5 is stock, 3.75 is max. The inner wheel just touches the boot on the tie rod end but not the actual end itself. They stuff in perfectly and are very much "in line" with the center of where the stock wheels were. I haven't had any rub at full flex with ome. American eagle makes wheels that look the same with 3.25 backspacing putting them 1" wider effectively. Klinetime has them on his earlier in this thread. I thought those would be more likely to rub but don't know.