The main reason for the way back positioning of the 5th wheel hitch is to unload the front axle and put as much weight on the drives for traction out of grass and clay track pit areas.
It is also been mentioned, it helps in the trailer trailing in tigh spots and aids in backing, and when you are long wheelbased you need all the help you can get.
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2001 GMC 6500 Topkick, 22' box, dropped frame, designed to fit into a 9' garage door. 3126 CAT 6spd Man Lo-Pro 19.5's w/ 3.07 rear axle ratio
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