Spare tire subwoofer with built in amp in Civic ExL hatchback | 2016+ Honda Civic Forum (10th Gen) - Type R Forum, Si Forum - CivicX.com
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
Cerwin Vega Active 12" Powered Spare Tire Subwoofer | Mercedes SLK World
Amazon.com: American Sound Connection Universal Fit Single 10" Subwoofer Sealed Replacement Spare Tire Custom Sub Box : Electronics
JBL Stadium BassHub Passive sealed enclosure with 11" dual 4-ohm voice coil subwoofer — mounts to hub of spare tire at Crutchfield
JBL BassPro Hub 11" Spare Tire Subwoofer w/ Enclosure and Built-In Amplifier | Reverb France
Kenwood KSC-PSW10ST 10-inch Hideaway Spare Tyre Subwoofer - Sound Garage