spare tire

Hey everyone! I am thinking about custom making a fiber glass subwoofer enclosure that uses the extra space inside a spare tire ( http://www.fitfreak.net/forums/fit-interior-modifications/38915-diy-fiberglass-spare-sub-box-56k-beware-tons-pics.html). I have seen some good reviews on it, as well...

I have a 2011 Jeep Grand Cherokee and I plan to put a subwoofer enclosure in it. I need some help on the best way to design it. I was planning on removing the spare tire and placing the sub enclosure in the spare tire well under the cargo area and firing the sub upwards. For my car I still need...

The place where the spare tire is tightened. I sanded it and went to the hardware store and got the right size bolt and a washer. What do you think?