As per my other thread, I am thinking about running 39.5 rockers on my Blazer. Anyone have and pics or info on the amount of lift and/or trimming I need to clear these tires. I'm sure someone here is running 40s. I may go with a different brand of tire due to the 16.50 width of the Rockers. What backspacing would I need with a tire that wide? I am just trying to get all the info I can, before I install the axles, to minimize down time and cost. My setup as it stands now: 4" springs up front, zero rate, Dana 60(not installed) Rear shackle flip(ORD), 6" shackle, 14FF(not installed) I understand my 16x10, 4.25 backspacing wheels are not going to work. I will be getting different ones. I am putting all of my faith in CK5 for the correct answers. Please only post facts. A guess doesn't help at this point. Opinions are appreciated. Pics are very helpful. Again, Thanks in advance, to the worlds best source of info for Blazers.