Stock 06 2500 5.7 was thinking about going with 285/75r17 on the stock wheels, I heard this size will fit perfectly and won't rub. But I'm trying to buy locally and I don't see anything in that size. Could I go even bigger without rubbing? I'm sticking to my stock wheels.

 

Which stock wheels do you have? You need to watch the rim width, if its not wide enough for the tire it'll wear unevenly.

I put 2014 Dodge 2500 wheels on my 2004, I run 275 60 20s (about 33"), there is plenty of room.