Hi, I have a 2004 Peugeot 407. It is making quite a load road noise when driven 40mph plus. The sound is like driving on snow tires, however I've checked the tires and they are fine. The noise continues unchanged when I fully depress the clutch and allow the engine to idle while still moving, it does not alter its pitch when I change gear or accelerate. When Im travelling along at 70mph in fifth gear, its sounds like Im in third but the engine seems fine.

Could this be wheel bearings?

thanks in advance for your help