After Market Rims

I upgraded to 18" from 17" on my 12 2500 CTD. You'll want to check the load rating for every rim you look at. Some I was looking at were only rated for 25-2800lbs. I actually had a guy at Les Schwab tell me that any 8 lug rim would be fine. Didn't buy there. Bought at Discount Tires like always. I told the guy at DT that I would be towing a 5th wheel and wanted to make sure I had the ratings for the load. He literally called every manufacture of the rims I was looking at. Interestingly one of the rims that was rated at IIRC 34-3500lbs said they wouldn't recommend it for 5th wheel towing as there would be to much stress on it.

A lot of rims that look real cool just don't have the load carrying capability.