try and get an actual weight rating out of american racing before you pull the trigger on those rims. I had 5 lug 18's on the tahoe limited and found out later on that the weight rating on the rim was only 1500 lbs each, on a truck that tipped the scales at 5850 lbs with the big block, 4l80, big rear and stereo system. That was before I put the 24 ft enclosed on the back. Not sure if you plan on using your truck for truck stuff.......but it might be a consideration.
if you read the description they're low pressure cast. The forged weld's on the suburban are something like 3800 lbs a rim. (ironically weld and american racing are part of the same parent company)
