Posted on 2/27/2026
A highway-speed vibration can make a good car feel worn out. Sometimes it shows up as a buzz in the seat, sometimes as a shaking steering wheel, and sometimes as a humming sensation. Highway vibrations are usually speed-related, which means a rotating part is out of balance, out of shape, or a bit loose. Why Highway-Speed Vibrations Feel Different Most vibrations happen in a speed window, like 55 to 75 mph, because that is where the frequency lines up with the vehicle and suspension. If it fades when you slow down or speed up slightly, that is a strong clue it is tied to rotation. If it stays no matter what speed you are at, think more along the lines of an engine or drivability problem. Wheel Balance And Tire Issues Wheel balance is one of the most common causes, especially when the steering wheel is involved. A small imbalance that feels minor at 40 mph can feel much bigger at 70 mph. If the front wheels are the issue, the steering wheel often sh ... read more