Thule Spare Me 2-Bike Spare Tire Carrier
Thule's Spare Me is their heavy-duty bike rack that connects to your rear mounted spare tire now includes Stay-Put Cradles for better stability, an integrated locking cable for better security.
Cool thing about this is that if you're lucky, this rack comes with a built-in swing system in the form of your door. This setup is elegant, tough, simple, and secure. Integrated locking is huge, since you don't want to be removing this on a regular basis. Tiny gripe: rubber chain straps deteriorate in sun. Take them off and store inside when not in use.