Got new wheels for the truck and now there's a hum

I got some 3rd gen TRD OR wheels for my 2nd gen RC today. The tires are the same as before, just swapped over. Previously, the white lettering was on the outside. Also had them rotate the tires while they were at it.

Now I'm experiencing a hum abover 40mph. It feels like the truck pulls to the right ever so slightly but I can't tell 100%, could have been crown in the road. The sound increases as mph goes up, getting louder too. I gave it a quick visual inspection to see if anything was hanging up or rubbing but I can't see any issues. I also feel it slightly in the gas pedal. Anyone have any experience with this? Could it be an alignment issue or tire wear? No sounds prior to the change. Thanks

Also, tires are Cooper Discoverer AT3 265/75r16. The truck does have wheel spacers (the bolt on, hub centric kind. they came with the truck.)

 

Flipping the tires on the rims along with the rotation might be the culprit. I'd guess that it'll smooth out in a couple hundred miles.