Actually these weigh less than my stock steel wheels and still cover my axle ratings. I believe they are "Ultra" brand but not positive.
They are stamped on the inside for weight. Google wheels and you'll see many more options for your 2500 Ram. I run these in summer and use the stock steel wheels for my winter tires. I'd also try to keep the same size as oem.

8 on 6.5 Jus2shy