I have looked but haven't been able to find an answer anywhere. I've had to switch my rim size due to not being available in 18"s. Looking at 20x9's with 33x12.50 Cooper STT tires. I'm leveling the truck with a 1.5" kit when I put them on but I'm wondering if anybody knows if this combo will rub with a -12 offset. I believe this should make the backspacing roughly 4"s on the rims. Or would a +12 offset be better since the backspacing would be roughly 5"? Any help would be great. I'm trying to order the rims tomorrow

 

I would go with the 2" or 2.5" leveling kit. I think you will rub with just a 1.5" I have a 2" with 20" rims no 33s yet but the truck sits very level.

 

IMO +12 offset with 5" of backspacing would work better for you. and totally agree with the 2" or 2.5 Level....it's only called a level if your truck sit's level and like stated above it will allow plenty of room for your new wheels and tires..
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my front only sits 1.5" lower than the rear. Maybe that's because it's a lariat?? I'd rather not have to order the 2.5 and then lift the rear if it's not necessary

 

Also if lifting it 2.5" will fit 35's, it seems that a 1.5 would fit 33's and look the same. I just dont know if the -12 offset would make it rub over the +12