front end shaking on 2005 Infiniti FX35

what causes front end to shake at speed above 60mph? Brakes & rotors recently changed,least than 100 miles ago.

Asked by for the 2005 Infiniti FX35
It could be as simple as tire imbalance. You could try rotating the tires and see if the problem improves or just get the tires balanced. While they are balancing the tires ask them to inspect the steering/suspension for wear.