Right front tire has a rumble sound when driving in the city but not on the highway. Its not all the time but it feels like the tire may come off sometimes. Had two mechanics check but they did not have the same experience or hear what I was complaining of. Plan to take it again and see if they can locate the issue. One told me it must have been my tires and I replaced all four tires and in a couple days the sound came back.
I’d be looking at the brake on that wheel or for a bad CV joint.
In addition to the two items Dave mentioned, I’d check the wheel bearing.