Had my car in for what I thought would be a wheel bearing swap today. But they checked and found no noise from the bearings, albeit without any load on them spun with the car on the lift. They did find some cupping to the front tires, but also did an alignment check and found everything within spec. So, any ideas where this rumbling sound is coming from? It is definitely rotational with the tire rotation frequency, not engine or driveline (it's there also when coasting w/clutch in or trans in neutral, with no brakes applied), but what else could it be? It sure sounded like bearings. Is it possible they only make noise when under load but not on the lift? My indy is super and basically talked me out of a bearing swap rather than take my money. He doesn't have suggestions other than possibly going to different tires in the future (presently using Goodyear F1 GSD3s). I have heard that the Goodyears can get noisy after a while. Also, I recently installed new rotors, but can't see how these could cause noise.