Rear road noise louder with speed? Not tires!

[Topless]

Wheel bearing, pinion bearing, or CV joint most likely. Get her up on a lift and start poking around.

[opus69]

I had a similar issue last year on a 2002S w less than 50K mi. It was the rt rear wheel bearing. I figured if one was going bad the others would too
Replaced all 4. Very quiet now.

[spongebob]

If the noise is increasing when turning it is most likely a wheel bearing that is damaged. This is the easiest way to diagnose it. Just do some long sweeping turns that puts some load on each bearing and listen. If one bearing is gone there is no reason to replace all of them as long as they are silent.