I believe what makes a rack RV rated is that it does not have a hinge at the back. So, an SUV rack, has a hinge to move out of the way when you open the tailgate. This hinge is a week point. When your RV bounces, more than a typical car or truck, that puts extra stress on the rack, especially with heavy bikes. The Yakima rack has a solid hinge (or lack there of) so it can not brake at that point. I've seen many types driving down the road, but so far my experience is good with the Yakima rack on the back of a 5th wheel.