You know, it never really occurred to me until I read about it. I have 18s so its fine. I mostly just cruise around so there is no noise. Yeh, over those concrete scored highways you hear some noise but never gave it a thought. Its a sports car. But I did insulate and will do the underside of the coroplast piece just underneath the carpet section and add more to the spare tire area to use up what i already bought. I also think a small thin
bed comfortor wrapped around the hatch area adds more. Those comfortors are insulated with a layer between the top and bottom. Or I may take the comfortor out and use a new piece of carpet insulation over the dynomat like product I used. thats it for me. I cant wait to drive it again. Maybe Thursday but Friday for sure since I scheduled an oil change. Im doin this because Ill be getting larger tires, possibly the 255/305 setup so This effort will not hurt.