Originally Posted by white04XF
went and had them checked at another shop today, both fronts were off. the right front needed .50 and the left front needed .75. went and tested it out at the speeds I was getting the shimmy, only had a mild shimmy around 60-65 mph. went home and parked the car, then drove it later and the shimmy had returned at 50 mph. next step is to try breaking them down, rotating the tires 180 degrees on the tires, then remount and balance them per Tire Rack's customer service line's suggestion. if this doesn't help, I'm sending them back for another set under warranty.
That sounds more like flat spotting of the tires, if it happening after the car sits for a while.
Crank the pressure up to 40 or 45 psi, and drive on the highway at 70 mph for about 10 to 20 miles, and see if it improves/vanishes. If it goes away after the miles at the higher pressure, its the tires flat spotting.
BC.