We have the spare tire mount on the back of our Roadtrek agile 4x4 and had the same dilema until I was looking in one of my jeep parts catalogs. I found a hitch mounted bike carrier that was designed for the Jeep Wrangler. It has enough clearance to fit past the factory spare tire carrier and swings down a lot farther then other much more expensive carriers to allow access to the rear doors, it is also very very stout, it hardly moves at all when travelling down the road, I'm sure you've seen carriers on other vehicles that look very flimsy to say the least, this is also made to go off road on jeeps so it's build very well. Quadratrek is the company, I have the 4 bike model and it was $167. , so much cheaper then Yakima, Thule etc.....