Hello folks, first off I did search the forum and the internet but could not find an exact match to my issue. I'm on my second ST which I got back in March of this year. A couple of months in I started noticing a shudder/vibration through the car between 80-90km/h, never above or below this speed. I checked the usual things, tire pressure, excessive play in the wheel bearings, etc. Everything seems normal, handling is tight and there are no noises coming from anywhere in the front or rear end. When I put on my winters it still does the same thing so that kind of eliminates the rims or tires being the cause. Lastly, its totally random, inconsistent, follows no pattern and doesn't seem to be linked to temperature, duration of driving, etc. It just comes and goes whenever it wants, more annoying than anything else but any help would be much appreciated, thank you in advance.