noice from back wheel
 

hello,

since i bought my 2003 wrx there has benn a noice from the back wheel, you can only hear it at 20mph anything above 20mph and the noice goes away, sound like a wheel bearing type sound.

there was dent in one of the rims, so i replaced all four wheels but used the old tyres.

i've benn told that its a out of shape tyre, what do u guys think?

dont want to replace tyres if thats not the problem.

thanks Dan