spare tire storage

IH8 Mud Team I have full height coastal offroad bumper on my 5th gen. I am thinking about downsizing my tires to 285\70\17 from 315\70\17. Want to get a bike rack on and it would stick out really far using a hitch extender. My bumper has the removable 2" trailer hitch which seems to go beyond...

I'm not saying it's a good idea , or a bad one, but I needed a solution for spare tire storage that wasn't flat on the floor until I get a rear bumper with a carrier. (F-ing typos are gonna get me killed one of these days) And the cnc made a giant butt plug, and that just made me...