I like to run one size over stock - on my Dodge 2500 it's 285/70-17 vs 265's. I recently bought a '16 Chevy 3500 and it has 275/70-18's on it which I believe are one size over the stock 265's. Previous owner also put on after market wheels that are wider with more offset which was causing some tire rubbing in the front fender wells. I had the front torsion bars adjusted to raise the front 1.25" and everything seems to fit pretty well. I'm not sold on the wider wheels and would prefer the stock wheel size, but it seems to be working fine other than slinging chit all over the side of the truck when it's sloppy out...
