Just ordered some Cooper ST Maxx for the 2018. I have a 2.5" level, but this still looks pretty close. He says if they dont fit without hitting the upper arm and hitting the bottom edges of the fender well, we'll send them back and throw the 275/70/18 on that he has in stock. Has anybody run these on stock rims with a level? If it works, what were your thoughts on how it affected the truck? I used to run 275/70/18 with a tune and loved them, so hoping these wont be much different, if they work. Anybody tried this with a similar setup? (stock wheels, 2.5 level, ect)

 

you will be fine. Many have done this same thing with no issues.