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: How Big Can I go With New Tires for my 04 3500? Ltrain 06-29-2004, 05:42 PM Well....since the day i bought my truck i have hated the tires...what junk.....i bought new wheels and now would like to buy new tires...What is the biggest tire i can replace the stock 215's? I dont mind if i have to add a spacer to the rear, i just want bigger tires...thanks by the way the truck is a 2004 GMC 3500 Dually Duramax/Allison -Ltrain afp1 06-29-2004, 09:35 PM My brother-in-law went with 235 85/R16s on his '03. You might need to crank the t-bars a bit in front. tysmith 06-29-2004, 10:05 PM 235 85 16 Revo's work just fine, no cranking of the t-bars necessary. The backs will probably wear better as you have duals.... KTDURAMAX 06-29-2004, 10:31 PM Go with 265/75/16...You will need a spacer, but works great. 255/85/16's works well without a spacer i'm told.http://www.dieselplace.com/forum/smileys/Ermm.gif Diesel Dually 06-29-2004, 11:47 PM I was told 235's were as big as you could go without messing with the VSS. I would love to see 255's on my rig! Texas Red Wagon 06-29-2004, 11:48 PM 255's and no spacers http://www.dieselplace.com/forum/uploads/scot_truck_023.jpg Scott Diesel Dually 06-29-2004, 11:50 PM Scott, are those wheels the same size as OEM? In other words, do I need new rims?? Texas Red Wagon 06-30-2004, 12:04 AM The backspacing is a little different. It depends on the tires also. Cooper discovery LT/255/85R/16 are the ones that I found to fit the best. I would say try your factory Rims but I doubt it will work. Never tried the factory wheels. Scott Diesel Dually 06-30-2004, 12:18 AM Gotcha...thanks! jeepinfun 06-30-2004, 09:43 AM 255-s should be about the biggest you can go without spacers | ||