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Discussion Starter #21
Thank you @panoguy.

Hmm, I didn't realize the PacHy was that much heavier... There are some other tricks I've seen that you could also try, like adding foam inside the actual tires... Here is an article from car and driver which touches the subject: Tested: Do Acoustically Insulated Tires Really Hush Road Noise? I also found some interesting videos in youtube videos of people who have done/tried this for their Tesla cars. It might be worth investigating. Thread here: DIY solution to deadening tire noise

Probably worth taking the time to add the CCF (closed cell) over the butyl as well. Remember that in my Pac I added the closed cell foam first to the metal and then the butyl on top of the CCF. (since I did this on the outside, not the interior)

G.
 
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