Heavy duty bike rack.  The U bolts are very short.  If you don't tighten them at exactly the same rate and keep them even, you might pop off a nut trying to tighten one side with shorter threads, and screw up the threads on the shorter side.  I had to have Swagman send me another U bolt because of this.  I've only tried the rack for a short distance.  I'm anxious to try it for long-haul trip.  I use it behind an older Honda CRV that has the spare tire mounted to the back door.  The rack just barely clears the tire.  I like the design that keeps the bikes fairly flat.