We've been carrying our bikes for many years on a bumper mounted bike rack using the 2" U-bolt receiver from one camper to the next. The spare tire comes off and rides in the truck. The bike rack is a Thule that the bikes' tires rest in so they're not swinging in the breeze. The two Trek mountain bikes with rack probably weigh less than the spare tire with bracket. Just the same, with our 2017 Jayco 28RLS, we ordered the optional hitch receiver since it was available. The spare tire will still have to ride in the truck.