I like aluminum, they don't rust, but the axle is still steel. and they can rust, and break.
I know, I spent a week in Bemidji one day.
They will if not protected, but I don't have to worry about somebody getting into it with a sharp pocket knife or can opener. I'm also much less worried about a blow out ripping up the side or pulling a fender off. They both have merit but I'll take the steel. To each their own.
