For the past three or four months I have been getting a noise which sounds like a wheel bearing going; i.e a continuous kind of whirring noise. It sounded like it was coming from the rear of the car. So I took it to a local garage to check and they discovered that the rear tyres had become ridged around both edges. So where the lateral grooves (from outside to inside) are, the leading edge was worn down so you can feel ridges, right around the tyre. They are Michelins, only a couple of years old. He said that on some estate cars that the shock absorbers may cause the problem when they have stopped working properly. He suggested replacing them. The mechanic said to first try moving the wheels from the back to the front to check that the sound was different and it is. Whehn I was at the tyre dealer getting them swapped around the guy there said that some estates when unloaded can "skip" along the road slightly thus causing the ridging over time. So my question is, does anyone know of this happening before on Accord Tourers? Is the cause likely to be the rear shocks? I have had the car for 6 years and not had this problem before, so the shock absorber theory sounds the most plausible to me.