2024 CVO Harley Midbass Subwoofer Saddle Bag Ring10" SUBWOOFER ADAPTER RINGS SOLD IN PAIRS SPEAKER AND RING MOUNTING HARDWARE INCLUDED! These are a CNC molded 10 wheel side mount adapter with a 11 OD, 9 ID 5*, and a mounting surface tilt to follow the flow more of the outside of the saddle bag, to allow a deeper speaker to be mounted with enough room for proper ventilation. Max mounting depth will vary by bag manufacture. Fitment will also vary by bag manufacture. Using a Quality bag or stock bag