Originally Posted by Lynskey
I would be hesitant to use that rack. The added weight of the rack and the bike(s) - along with the spare - will be challenging the factory spare tire mount weight capacity. I use a hitch and have a Thule T2 bike carrier for mine.
X2 people have issues with the seams on the door pulling apart with a little larger tire due to weight same could be said with bikes over a time.
I got a hitch mount version to be safe and like it better anyway as it is not rubbing my bike frame and brake lines to hold it.
But ref your question yes the tire and lugs hold it in place.