I agree with longbox55. He is absolutly right.
I myself am a mechanic and work at a kal tire who specializes in front end and drive train repair.
Worn\miss-aligned front end parts wont cause a vibration or shimmy. You should also take rusty rods
advice and double check the bearing adjustment while your wheels are being balanced.
Keep an eye on your front tires for unusual or uneven wear. that will be your indicator wether or not you need an alignment.