belts bad in all 4 tires? Would I feel vibration on the road?

What is your question?

I have vibration in my stearing wheel (nowhere else) at speeds greater than 60 mph. Tires were balanced and no change. Was told that the belts in all 4 tires were "moving around". Got new tires and vibration in steering wheel still there. Finally determined the problem was the L hub, knuckle and bearing. My question is: did I need the tires and were my belts really bad? 40K miles (90K life) on Michelin HydroEdge tires.