Ok, so I got my 255/35/20 falkens on today...everything is good, wheels feel balanced, road noise I can handle...but!!! I get this weird "WAAOOOWWWAAOOOWWW" ringing/singing/whining sound at around 55-65 mph that's LOUD!!! I'm wondering what this could be? I'm wondering if this could be the hub rings I installed also? Any thoughts? Discount tires is giving 2 days to decide what I wanna do w/these tires.

 

It might be one of your wheel bearings. I had the same problem, thought it was related to alignment or tires since the wheels didnt have any play in them. You can figure out if its the wheel bearing or not buy turning left or right when you can hear the noise to see if it goes away.