Both hum, but a bearing's pitch changes when you load it — swerve gently and the hum gets louder or quieter as weight shifts onto and off that corner. Tire noise stays constant. A worn bearing left alone gets hot, eats the hub, and in the worst case lets the wheel wobble; caught early it is a straightforward one-corner repair.
Need hands on the car instead of more reading? VIPCANIC comes to your driveway anywhere in the South Bay, 24 hours a day — call (310) 340-6775.
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Call (310) 340-6775