I have a 6in fabtech suspension on my 03 2500 currently with 35in nitto terra grapplers. I want to go to 37in nitto mud grapplers but with nittos going up to 37's for 17in rim it adds another inch to width which is 13.5. Fabtechs recommendations are up to 37in tire and 12.5 width with minor trimming. So my question is could I fit the 37x13.5 without butchering up my fender wells?

 

should be able too, buddy of mine has 37x12.5 on a 2.5" levelling kit more than likely gunna take the control arms at full lock but, stock rims? any offset?

 

It's not stock rims but not sure of the off set. These rims were on the truck when I purchased it. If I had to guess it does have some offset.

 

i'd go for it, if it rubs you can trim the inner fenders, or just be careful too keep it away from full lock!