2014 IMPALA ROAD NOISE
HAVE 19' low profile tires. Noise very loud between 38 to 50 mph. Sounds like unbalanced tire on megaphone, but no vibration
could be a wheel bearing
Tires with uneven wear will make this noise and it will get worse as the tread wears. You could have it checked for a bad wheel bearing. Information at the link may be of some help.....https://axleaddict.com/auto-repair/What-is-a-wheel-bearing
you are the one who wanted the cool wheels and tires- now you find they don't perform on the highway- go back to stock and see if the noise goes away- then sell the bling-
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