I have a new 2002 2WD Highlander Limited with the upgraded Michelin tires and have 4K miles on it. I drive on a smooth surface 16 miles per work day. I don't usually drive at speeds over 60 mph. Some where about 2,500 miles while on a 50 mile weekend trip. I noticed vibration in the steering wheel acting like one or more of the wheels were out of balanced. I have rotated the wheels once and they have been balanced 3 times. I'm still having vibration in the steering wheel in the 65 to 70 mph range. The balancing has reduced the vibration somewhat, however it is still there. Has anyone else had a similar problem??