I have a set of brand new Duratracs on my rig in a 285/70/17. When I am at about 35-50MPH I have a pronounced pulsating hum coming from the tires. I realize that these tires are going to make some noise (a constant humming) however, I am wondering if I have a tire that may have a manufacturing issue with tread inconsistency or something..? Or is this normal? I don’t have any unordinary vibrations or shaking going on. Its purely audible. Thanks for any info!