Has anyone had to replace a rear wheel bearing more than once in a year. I'm on # 8 now. What the hell is up with this thing... I'ts not just one, both go at different times. I don't get it. And does anyone sell an aftermarket hub?? Im getting sick of these things too, every time the wheel bearing goes, it takes the hub with it too and the damn thing is $90, I've paid over $400 in hubs this year. HELP!