i would like to find some aluminum wheels for my 07 dually ram 4x4 . every pound i take off the truck is more i can carry. that would help me pick more loads at work.

 

I don't think saving a few pounds in wheel weight is going to make a significant difference in your load capacity WRT GVWR. Besides, the wheels and tires are unsprung weight, not load capacity weight. They are nice in getting you to bigger tires with minimal weight compromise, if that's anything to consider. The Centerlines with 295/60 20s on my truck now are only 6lbs heavier than the stock steelies with 285s they replaced. Considering the actual amount of rubber/tread that was there they are probably about the same or maybe slightly less weight than the new stockers.

 

alcoa would seem like the obvious choice, I think american racing makes some knockoff alcoas too.