Rhythmic Rubbing on Pavement?

I’ve got this rhythmic rubbing sound when driving on pavement with my XP1000. You can actually feel it also. It’s not noticeable when I’m dirt.

It feels like a classic out of round tire, but none of them appear to be out of round.

Anyone have a good way to check for an out of round tire other than the obvious of jacking it up and rotating it which does not reveal anything abnormal?

Has anyone else noticed this on their XPs and found any other causes?