I have a 2014 European Honda Civic Tourer and I am getting quite fed up with it sounding like a GSXR 750 is right on my left hand rear. I can’t work it out. Stick the clutch in at 120KMH (70 mph) and it’s not engine or exhaust because the level stays the same. You can hear it increase with frequency if you sped up, decrease in pitch as you slow. The quietest it seems is at a fixed 79mph. Which is nice but may attract unwanted attention… anyone help me out here?
Wheel bearing or bad tire or dragging brake. Swap the tires around to see if it follows the tire. Check the bearing and brake while it is jacked up