Purchased a JK that came without a spare. I'm going with the Havoc AfterShock rear bumper, and was thinking that if I chose to get a spare down the road to match the other 4 wheels/tires, I might have to get another bumper w/tire carrier....that is, unless the TF HD can handle a 40x15.50 tire. Thoughts? Has anyone attempted it? I believe that "advertised" its rated for a max 37" tire, but I figured I ask ...