When I bought mine 10 years ago the 10500 lb steel tow bar was cheaper than the lower rated Al bar. The main differance was weight between Al and steel. I choose the steel 10500 lb Demco because I only had to remove it once a year, it was cheaper, I felt more comfortable with the added capacity even though my tow car was only 2800 lbs. Another thing to think about is the fatigue of the moving parts of the bar, starting stopping, potholes etc. takes a toll on metal. I know of two friends that had Al tow bars fail with the lower rated bars.