Custom Fit subwoofer enclosure for 18" spare wheel | eBay
For those of you who want more bass but don't want to sacrifice your spare tire or hatch space, I highly recommend this spare tire mount subwoofer : r/GolfGTI
Spare Tire Well Speaker Box Sub Subwoofer Enclosure 12" 1.4 cuft of Ai – AK Audio
Spare tire Ported Subwoofer Box - YouTube
Building a Fiberglass Enclosure
Ford Excursion Subwoofer Enclosure - Spare Tire - SRQ Customs
Subwoofer box using the spare tire | DIYMobileAudio.com Car Stereo Forum
Custom Invisible Subwoofer Enclosure for Your Spare Wheel Recess : 5 Steps - Instructables