Ok I have a 09 ss/tc and my buddy had a 06 ss/sc with aftermarket rims. He was getting rid of the car and I wanted his rims. So we swapped his aftermarket konig I believe for my stock ones. After alot of hassle and some modica bros. wheel spacers the job is done and his car is gone. So here is my question. I have th wheels balanced but I'm still getting a slight vibration at 55mph the car tracts straight but the steering wheel whobbls back and forth just a little. Any ideas??? I'm afraid that this might hurt my car down the road.

 

Toe could be off, its an alignment issue. Are the outside edges of the tires cupped ( sort of jagged from one block to another)?

Do you have any vibration during Braking?? If it gets worse during braking it could be warped rotors