Hi. Looking for advice.

Have a 2009 Honda Accord Tourer. DTEC 2.2

I had been getting an odd intermittant sort of out of balance sound/ bumping/ rumble from the rear passenger side wheel. I do a 50 mile trip to work each day and the sound starts when I get on the motorway and stops after around 20 miles. Its not the surface as other routes follow the same pattern. If i slow down because stuck in traffic the sound starts up again - so I figure there has to be a heat related element.

Checked the tyre and it was cupped pretty badly with some wire coming through. I thought it must just be a crap tyre. I didn't recognise the make. Got both rears changed to goodyears - sound is still there and the pattern remains. Comes after a few miles then dissappears after 10 to 20 miles.

I can feel it through my foot when breaking but it generall slakens off when I accelerate - for a while then comes back strongly.

I'm thinking wheel bearing? anything else to check.