My steering wheel shakes when I go over 55mph. I just had my car balanced and rotors changed?
Look for a bump on one of the tires. Also, you may have a bent wheel. The person who balanced your tires didn't do it right or maybe one of the weights came off. Either case if you have your receipt, take it back and have them balance the tires properly or tell you they can't. If they don't have the proper equipment they should give your money back so you can have it done properly. If the tire is too bad, you may have to replace it. The resonant frequency of most suspension systems is close to 55 due to the weight of the wheels and spring stiffness.
