I have an old Mazda 6 with 215/45-R18 all-season tires that produces significant road noise at highway speeds, even with the engine running low RPMs. I am wondering:
- How much do the tires contribute to highway road noise, and
- How much can tire selection alter that?
I understand that adding noise insulation is another means to mitigate noise. I'm just curious to what degree tire selection (within the same size and class) can alter road noise.