Tenzo's tend to be overweight.......the AV-7's weigh in at 20# per rim for the 17 X 7 then you need to add in the weight of the tire you are putting on.

CenterLine RPM's a six spoke design forged 1 piece weigh 13.5# for the same size rim. Cheapest I've seen them so far is $275 each at Discount Tire, and they are not a stock item.