(maybe I should clarify if all I'm going to get back is generic responses I'm already aware of)
well is this for all bikes no matter how much they are ridden or just bikes used in an "average" sense? I redid bearings on my rear wheel, and the grease is already mostly gone (it was kind of a liquid coating when I found it), it's riding hard, etc after about 2 or 3 months, which is why I'm asking this. I had a problem with axles bending on this wheel, too, but I found the replacement axle in it (installed 4 or 5 months ago, I guess?) basically straight.
Or is it possible that the wheel hub itself could be bent?