Couple of things:

1) Load force balanced? This should not only result in nearly perfect balanced tires but the tech should note a tire/wheel that requires too much weight to balance properly which can be due to a wheel being damaged or a tire defective. If the tech knows what he's doing he should be able to spot a wheel that has too much run out (the factory manual gives a callout on too much runout) or even a tire that has runout.

When you take the car back to have the tires rebalanced are the tires out of balance? Is a wheel weight being lost? The tire tech ought to be able to spot the missing weight(s).

2) What brand of tires? N-rated? N-rated tires are recommended and are supposed to be made at one factory (for each tire brand) to control quality. If you buy a non N-rated tire the tires can be made anywhere and in fact could be made at 4 different factories.

3) I hope that the tires are checked for proper inflation pressure cold. I have found overinflated tires and not overinflated by too many PSI can introduce a vibration symptom that is impossible to tell from a tire imbalance problem that no amount of tire balancing will correct.

4) When was the car last treated a proper 4 wheel alignment? Even if the car is not necessarily exhibiting the more obvious symptoms of mis-alignment and the tire wear is even, a mis-alignment can produce wheel imbalance symptoms.

Sincerely,

Macster.

 

^^ This n-rated nonsense again?

I've had N rated tires fail roadforce. Absolutely could not be 'balanced' due to felx variations in the carcase. Michelin P2s... exchanged with NO questions.