This is brilliant. I have two trailers with a 2" ball and an old boat trailer with a 1 7/8" ball (why?). This is an elegant solution to the problem. There is no way to attach the balls to the rack, so I keep the balls in my truck so they don't get stolen. When I need to troll, I just dig up the right size ball and throw it, it only takes a second. I can do it without a screwdriver, it's not that hard. I've had this on my truck for about a year and have had no trouble putting the balls on or off, even after the hitch got dirty. I don't tow anything heavy, my heaviest trailer might be 1000 pounds, but it pulls like any other ball.
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