Just looking for advice on what to do next. When going 40+mph there is a steady whir-like noise coming from the front end. Bought the car with new tires on them, tread looks good...no uneven wear or trouble spots. Thought for sure it would be the wheel bearings so I just replaced both front wheel hub assemblies but the noise continues. Could it be just new tire tread causing the noise? I'm going to get an alignment done soon, but it doesn't sound like a wobble or adjustment issue. Just a steady, constant whirring. Any thoughts/suggestions on what to look at/replace?