low frequency rumble

[WReed82]

Hi Folks,

My 2014 named Maeve has a constant, low frequency rumble, down about 30 hertz.
When stopped there is no sound.
When driving it can be heard whether I'm driving 25 or 45 mph.
I know what a worn CV joint sounds like, and it changes pitch with speed.
This sound doesn't change pitch, so I don't think it's a CV joint.

The weather is cool here, varying between about 30~60F degrees so the AC is off.
I've been wearing warm clothes rather than running the heater.

Any ideas what this sound might be?

Thanks and good health, Weogo

 

[WReed82]

Hi Folks,

Answer to my own question:
Today Maeve got inspected and the shop looked at the tires, drove her.
The rear tires are original, not as supple as they used to be, and in cooler, not summer, weather, and causing the rumbling.
In a year or so I'll put some new tires on the rear.

Interesting thing is that the frequency doesn't change with speed.

Thanks and good health, Weogo