±1 for the Sparetime. It also has a bit of adjustment to offset the hanger to one side for spare tires which aren't centered. My Kaymar spare is on the DS and I didn't offset it. 1/3 of my MTB tire sticks out the side. No biggie.I have used this for 3 years now & think it's the best solution as long as it is for 1 or 2 bikes
http://www.yakima.com/shop/bike/spare-tire/sparetime
The mount goes behind your spare tire & sticks out the hub hole. The rack itself can then be easily be put on or taken off in a couple of minutes. The arms fold down when no bike is on it.
Racks that mount to our swing out spares have an inherent advantage over most hitch mount options here because you can access the cargo hatch easily. There are a couple of hitch options on the market that can swing out or fold down but they’re pricey.