[Chevelle-List] Tire Balancing

[GSawn]

I just had my alignment done and tires balanced this weekend. The tires were pretty bad and needed about an ounce each. I drove about 400 vibration free miles on them and they need to be balanced again! The weights haven’t fallen off, the wheels and tires I bought in September only have a couple thousand miles, and the shocks, springs, and ball joints are all brand new. Does anyone know what could be causing this problem?
Thanks.
George