Swerv

I'm rolling on Toyo Spectrums in the stock size- 185/65-14. They have about 9,000 miles on now, and has been about 4,000 since the first and only rotation so far. Everything seems to be wearing evenly.

Recently, I've started to hear a low pitch hum when I take a right hand curve, left side loaded. I'm wondering if this is tire noise or if it could be a wheel bearing. I think I'll get them rotated today and go for a test drive to see if it changes.

Has anyone else noticed this on all season tires? They're bi-directional, so is it possible they make more noise on one side than the other? I really hope it isn't a wheel bearing. Please advise.