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Hi Glenn, If the pins are loacated the same over the TV axle and the distance from the pin to the axles were the same, both trailer types would have the same turning radius upto 90�. The GN has a slight advantage as it can turn slightly past 90� but then the trailer begins to bind on the TV as it enters greater than 90� plus. The 5th wheel flat bolster plate adds side to side trailer and TV stability "if" it only moves in one direction, forward to back, but most of the newer 5th's have side to side bolster plate roll loosing some of the stabiltiy, but some do have a side to side lock out pin that can be installed/removed at will depending on use. A RV type 5th wheel doesn't have the side to side stability as a semi 5th wheel as the RV bolster plate is typicaly 8" round/square where a semi bolster plate is 30" or larger. On ruff terrrian a GN clearly has the most advantage while hitching/unhitching but the newer multi-tilt 5th wheels are a close second. If you didn't have any tailgate/deck restriction, a GN can articulate at a greater degree front to back than a 5th. I'm currently building a air ride 5th wheel hitch with a GN to 5th adapter so that I can run both types of trailers at will. T_Bone
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