The issue in your case is not weight, quite the opposite is the “lift” created by the wind against the kayak. Most racks are set to hold weight but not to be pulled upwards.I read a few threads about this. I have a 2018 JL Sport 4Dr. Have a 60lb Kayak. Only racks I have found advise against water sport equipment im assuming because of weight? Has anyone found a good solution to this? Rack, hitch, other creative? Thanks!!!