Manufacturer professional wheel spare tire subwoofers sundown audio subwoofer car with 10 inch bass speaker - AliExpress
Subwoofer in spare tire - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB
JBL BassPro Hub 11" Spare Tire Active Subwoofer Car Kit - 300 Watt Spare Wheel Housing Car Subwoofer with built in Amplifier and Fiberglass Woofer : Amazon.co.uk: Electronics & Photo
Kenwood KSC-PSW10ST 10-inch Hideaway Spare Tyre Subwoofer - Sound Garage
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