The bearings have less than a week on them and everything was torqued to spec. Could bad u joints in the drive shaft cause a humming and vibration? Just to clear things up, the only time I feel the vibration (rumble strip) is when I am almost to a stop. Even when my foots off the brakes. Sorry about the confusion guys.
By the way, the front tires have been on for a couple months and I just recently got the rears on. Maybe the humming is coming from somewhere else, kinda hard to pinpoint.