I have a question : I have the accessory hitch installed as I was planning to carry at least 3 bikes with the Tesla/Yakima rear bike carrier. The problem is I didn't know the hitch would only support 120 lbs and the bike rack itself weighs 40-44lbs. That makes only 76-80 lbs left for the bikes themselves. It is not enough. My bikes - all combined - are up to 91 lbs, which means my cargo is 11-15 lbs over. Do you think is it serious/dangerous ?