shaking & vibration

What is your question?

I had 2 used tires put on the front of my car both tire are the good tread no wear,now my car have start to shake a vibrate,but one you reach a speed of 71mph the noise stop.I took it to Town Fairs Tires explain the problem to them and all they did was computerize balance no road test same problem,when we got home we called tire shop and was informed that the 2 front rims were bent & this could be the cause of the problem