Bigger tires on a 2011 Chevy 3500 srw?

Bedlam wrote:
As the others have posted, your wheel openings may be too small for those tires without giving your truck a lift or modifying the wheel wells.

Are you sure your rims are rated sufficiently to handle the weight you plan to carry? I ended up going to the 19.5" rims and tires to ensure I had a good margin on my capacities.

I have done some research on this. There are some others that have done this, without a problem. But they have lifted the front end 1-1/2 to 2 inches. Also if you google "norcal fender mod", he has a easy mod that cures any rubbing problems. Looks pretty simple.

As far as the rims go they are forged aluminum. They should be pretty strong. Some time ago I posted a thread on what they could carry and no one was sure. Nobody could come up with facts. I even had a tire removed and found all the numbers on the rim. They may be in code but nobody could figure it out. Many though believed they should easily carry more. My tire dealer who is friend and runs a pretty good size shop also believes the rims are more than adequate. All that being said no one was able to find ratings on these rims.

Point is I am looking to upgrade the tires to have more safety margin,
Like I said fully loaded now I maybe a couple hundred pounds over. That won't change whether or not a get different tires.