k im having a problem with my car vibrating/shaking when im on the beltway doing between 60-75 any slower or faster it dont shake and i dont feel it in the steering wheel or brake petal just whole car shakes could it be the tires? please help, thanx in advance

 

shakes how? back and forth stutter shake, or a vibration shake?

 

If its a vibration shake the tires might need to be rebalanced.

 

its a vibration shake rear tires need replacing