Originally Posted by
CrankyOne
Aluminum is a harsher ride than steel and geometry cannot overcome it. Aluminum is also more brittle and more likely to develop cracks or other faults in the frame so a steel bike will last longer. That said, aluminum is also lighter. Steel will rust but it won't rust through or loose its strength because of rust.
Ignoring the stuff about materials and ride quality (which is incorrect) ... what do you mean by steel won't "loose" its strength because of rust?!