That sounds more like the tires to me.

I would run it in gear with the wheels off the ground to pin point where the noise is coming from . if it,s quiet up in the air , it,s probably just the tires.

Changing the bearings without new races is a waste of time and money. With all the right tools it,s fairly easy ,without them it,s a p.i.a. the 9.25 has a 12 bolt cover shaped like a stop sign.