Friday, August 1st, 2008 AT 7:38 AM
I have a very odd rhythmic vibration at about 80 mph. It will vibrate for 2 seconds then be smooth for 2 seconds then vibrate again -- on and on and on. 2 days ago I got new rotors front and rear and 2 new tires which they put on the front and put my old tires on the back.

