biggest tires possible for a stock non lifted 04 dodge 2500

i was wondering how big i could go height and width wise without rubbing without lifting my truck cause those stock tires just dont fill up the wheel wells i had a set of good year wrangler mt's in mind i think they were 305/70/17 they said they were 34 inches tall and the tread width was 10.5 inches these should fit with the stock wheel offset without rubbing right ? does anyone have these tires? do they howl going down the road ?  
2004.5 2500 cummins 4 in to 5 in miter cut stacks by mbrp  k&n filter and diablo sport programmer and quadzilla boost fooler,fass 95, 35 inch nitto dune grapplers

youd be fine running the 305 70 with no lift thats what a buddy of mine ran on his 06 dodge with no problem at all just dont try to go much bigger.. good luck  
2006 f-350 lariat 4in exhaust& downpipe, 6sp. man., banks intercooler & boost tubes,high ram intake,air intake, six gun, pda, 2 in.skyjacker lift 35x13.50 mickey thompson atz's on 20" diamo 8 karats,arp headstuds
97 f-250 4x4 351, looking for a dana 60 and a  12v cummins for a little project
MEMBER BLOWIN SMOKE GANG

If you stick with an all terrain and the factory offset wheels, you can get by with 315/70R17 which are essencially a 35 x 12.50. Mudders with aggressive tread blocks on the sides of the tires may require a 2" leveling kit to clear the same size. I have 33 x 12.50's on my truck.  
2003 Dodge Ram 2500 Laramie 4x4. H.O. Cummins, 6spd manual trans, 4.10 gearing. Intake, Exhaust, Hot Juice, HTT HTB2 62/12/65, Jake Brake, 305-65R17 (33 x 12.50) Pro-Comp Extreme All Terrains, SBC Con O FE, Fuel Tank Vent Mod,  Various other gizmos.


I-6 Cummins guys are keepin' it straight. Those other boys swing both ways.

I have a set of BFG KO's 315/70/17 on my stock wheels with no lift.  They ride fine and do not rub, I did go down to a load range D though.  

Sorry I left out some important info, the truck is a 2006 2500 Mega Cab 5.9L 4x4.  

i was wondering will the 33s or 35s affect mpgs alot i have gotten around 21 on the highway now and id like to maintain that if at all possible  
2004.5 2500 cummins 4 in to 5 in miter cut stacks by mbrp  k&n filter and diablo sport programmer and quadzilla boost fooler,fass 95, 35 inch nitto dune grapplers

hello i'm new at this. i want to go bigger but don't know if i could get by with NITTO MUD GRAPPLER TIRES. 35x12.50R17 on stock rims with out lift kit on a 03 ram 2500.  

Yes you can get by without a lift on the front but I would put a 3" leveling kit on.  Thats what I have on mine and it looks alot better but you will need to get longer shocks.  Go to TOPGUNCUSTOMZ.COM they will have what you need.  Those NITTO'S are going to be very loud when you put some miles on them,  I also had some of those a while back and will never have them again.  I would try TOYO M/T or DICK CEPEK M/T.  I currently have the DICK CEPEK M/T (35x12.5x17) not loud at all and ride very good for a mud tire.  
2006 Dodge 2500 Cummins,smarty,k&n Intake,5"TBE,Banks High Ram Intake Manifold, Phantom II Guages, 4" lift 35" Dick Cepek M/T,Quadzilla Max Mileage