Swagman XP 2-Bike Spare Tire Mount Rack for Sale. Used, but in good condition. Below is info from the manufacture...
Designed for use on vehicles with a rear spare tire carrier, the XP 2-Bike Tire Mount Rack from Swagman attaches securely to your center or side tire mount with a dual retention system. The bike rack incorporates the same rotating cradle design to level the bikes for increased ground clearance. Kraton wraps in the cradle provide a scratch-free ride for the bikes and increased grip. The cradles can accommodate up to a 2-inch frame tube and the rack offers a carry capacity of up to 35 pounds per bike. To better position the bikes to the center of the vehicle, the rack can be mounted on center mount spare tires or on side mounted spare tires.