I recently put on my winter rims and tires. I noticed a noise coming from the rear of the truck, around the wheels. It speeds up and slows down with the sed of the vehicle, sounds like a metallic ringing noise. My brakes are low as the sensor is coming on, on the dash but the noise doesnt cease when I hit the brakes. Im doing my new pads soon, so that will rule that out. I could swear that when I engage and release the parking brake, that it ceases for a little and comes back. I changed the parking brake shoe about 30k miles ago and I never use it so I dont think its that. I changed the Main driveshaft bearing about 15k ago, but so Im hoping its not that again. I use 10mm spacers but they seem intact and the winter wheels use hubcentric rings but everything went on smoothly. Im going to put hte truck up on jack stands and see if I can identify the noise a little better this weekend but it has to be something from the wheels or the driveshaft as its a sound that is in synch with the speed of the wheels turning, it speeds up when I speed up etc etc. Any ideas or suggestions that Im missing? Could it still be from the worn brakes even though press thing doesnt affect it?