Very interesting. I have a vibration problem with my Pilot EX. It came with Bridgestones and has 3200 miles on it. At speeds above 60 mph when just starting out it has a very pronounced vibration that comes and goes with a period of about 5 seconds. When the tires and drivetrain warm up, the vibration is still there, but not as noticable. I'm about to ask the dealer about it and appreciate the information in the link.