09 Tacoma, roaring noise..

Update 09 Tacoma, road noise at 60 mph , I replaced tires, front wheel bearings, my mechanic said he thinks the noise is coming from rear differential bearings, ..where is the best place for parts..

 

what kind of tires?
why the rear repair if the front was worked on?

Do you know where the noise is really coming from? don't want to waste money on parts not needed

 

I thought the noise was coming from drive shaft, but dealership said it was front bearings..so, I replaced them..I put new tires on thinking maybe that was problem...I just want it fixed..so, I can drive it..hopefully, rear differential bearings...otherwise, I will have to park it as a redneck lawn ornament ..