Actually, pound for pound, aluminum is stronger than steel. So you can get the same strength with less weight. And it doesn't rust.Why would I want an aluminum bumper? Aluminum is softer than steel and is probably not as durable. Are the weight savings really that big of a deal? Other than weight, what are the advantages of aluminum?
Give me a steel bumper any day of the week.
Weight IS a big deal. The more weight your Jeep gains, the more it saps power and fuel economy. It also takes more tractive force to move a heavier Jeep. So it gets stuck easier and is harder to recover. Higher weight also puts more stress on drive train components. And finally, aluminum doesn't rust.