All the Hummer H1 wheels use a standard 8 bolt x 6.5" pattern found on Chevy and older Ford trucks. This doesn't mean that you can use just any wheel on your Hummer. Wheel load capacity is most important. It would be pretty devastating if a wheel cracked in half as you were driving down the highway at 65mph. A Hummer is much heavier then most trucks, especially loaded with accessories and requires a wheel that can stand up to the weight and off-road abuse. My stock 98 wagon weighs 8000. The factory 2 piece steel wheel is rated at 3,400 pounds. The Cepek 17" aluminum wheel is rated at 4,500 pounds. Most owners don't realize that the stress and strain on the truck is much more on the road due to the speed of the truck. Hitting a bump off the road at 2 or 3 mph is much less stressful than hitting a pothole at 30 mph or the constant punishment of driving at 60+ mph..
The reason the steel has a lower rating is partially due to the fact that a steel wheel can be hammered out to reshape if needed. Aluminum or Alloys can not, and thus have/require a hire rating - twice the load rating the wheels you are contemplating have.
