ok, I assume you mean the tires are out of balance. This can easily happen with a tweaked wheel. The B44 rear hubs are plastic and have the larger outer bearing and it will save you some cash. Hub bearings dont last a long time. I would get some avids, they are like a dollar each. get the b44 hubs and order the bearing you need from avid. As far as the wobble. Probably wrapped rims, nothing you can do. also, make sure you get the avid revolutions and face the rubber seal outward.