Solutions for spare tire subwoofer bolt not fitting trunk floor bracket?

[DCBuckeye]

Not sure how much of a "mod" this is, but this seemed like the most appropriate part of the forums...

Short version: I'm wondering if anyone has advice for mounting a spare tire subwoofer when the bolt provided with the sub is too thick to fit in the bracket mounted to the floor of the trunk.

Longer version: I ordered a Rockville RockGhost V2 subwoofer. It is supposed to mount inside the spare tire, and it ships with a bolt to pass through the subwoofer and the inverted spare tire to screw into the bracket that secures everything in place. The problem, as you can see in the attached picture, is the bolt supplied with the subwoofer is too large to fit in the threaded holes in the bracket.

I've emailed the Rockville support team but am chewing on this myself in the meantime. I've already thought of drilling and tapping the hole to fit the new bolt, but I'm not wild about that idea for if/when I have to go back to stock.

Any other ideas or suggestions? Maybe just to to find a bolt of the right diameter and same or longer length? I worry it may not be strong enough to hold everything in place, but I guess I could add some foam or other padding around the tire.

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[JAM486HP]

Wow, never knew these existed. Just found this thread tonight as I concluded I need more bass, the B&O sub not doin it. I have to try one of these. Where are you tapping in from?

Maybe a way to incorporate a thread reducer? I would put some sound deadening padding in there anyway.

 

[DCBuckeye]

Wow, never knew these existed. Just found this thread tonight as I concluded I need more bass, the B&O sub not doin it. I have to try one of these. Where are you tapping in from?

Maybe a way to incorporate a thread reducer? I would put some sound deadening padding in there anyway.

Yeah, I think this is going to be a bit of a process but I'll report back how it goes. Folks who've installed more traditional subwoofers but did not have the factory B&O subwoofer have tapped into the wiring harness going to the rear deck speakers. I have read mixed things on whether, if you do that, you need to disable a noise canceling microphone (I can't imagine why they'd have noise canceling on a V8, but...)

If you do have the B&O, there is a huge thread on here where the author shows how he tapped into the feed to the subwoofer.

Assuming I'm able to make this work, I'll share pics and info on process.

For now, I determined the factory bolt is M6x1 and ordered a 200mm length from an online specialty supplier. Hopefully it'll work but I'm expecting more curve balls along the way.

 

[Paul's stable]

Not sure how much of a "mod" this is, but this seemed like the most appropriate part of the forums...

Short version: I'm wondering if anyone has advice for mounting a spare tire subwoofer when the bolt provided with the sub is too thick to fit in the bracket mounted to the floor of the trunk.

Longer version: I ordered a Rockville RockGhost V2 subwoofer. It is supposed to mount inside the spare tire, and it ships with a bolt to pass through the subwoofer and the inverted spare tire to screw into the bracket that secures everything in place. The problem, as you can see in the attached picture, is the bolt supplied with the subwoofer is too large to fit in the threaded holes in the bracket.

I've emailed the Rockville support team but am chewing on this myself in the meantime. I've already thought of drilling and tapping the hole to fit the new bolt, but I'm not wild about that idea for if/when I have to go back to stock.

Any other ideas or suggestions? Maybe just to to find a bolt of the right diameter and same or longer length? I worry it may not be strong enough to hold everything in place, but I guess I could add some foam or other padding around the tire.

Would this work with a Dark Horse that has no spare?

 

[DCBuckeye]

Would this work with a Dark Horse that has no spare?

Honestly, I don't think so, not without a lot of work. You need something to nestle the subwoofer in to keep it from moving around.

I'm returning it. I ordered a special bolt from a specialty store that would fit the threading on the Mustang's bracket, but it still didn't work right. On top of it all, with the spare tire, the cover didn't fit right any more and was lifted about a 1/2" to an 1" from the rest of the trunk floor.

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