Had my spare tire off my lj today to figure out what I have to do to mount a 33 inch tire back there. I've been planning on putting a subwoofer behind the rear wheel well on the driver's side. I was looking at the spare tire mount and I was wondering if anybody's ever put a sub in the tailgate and closed up the spare tire mount as a box for the back of the sub. Just thinking outside the box as usual. The only real issue I see might be wiring it. And what's that vent under there for anyways?