Help guys, I'm not sure what's going on with my car. Several weeks ago, I got a flat tire and I replaced all four tires with 19 inch Michelin Pilot Sport on my stock rims. The tires were balanced and then I had the car aligned at Firestone. I've noticed that my car starts to shimmy when I'm driving on the freeway. My car never did this with my old tires and I'm not sure if this is normal. I was thinking maybe the freeway is causing this shimmy effect or maybe my rim is bent, but the rim looks perfectly fine and everything was balanced and aligned. Anyone have any advice as to what I should do or have checked out on my car?

 

New tires do take some time to break in... There are kind of slick at first from the molds when being made...

How many miles have you put on them since they were brand new?

 

if sedan put your rear tires on the front and see if that vibration continues.
if no, your front tires are out of balance.

if on the coupe.... kinda out of luck. take it back and get it re-balanced
on a hunter machine.

 

I missed the part you said when it starts to Shimmy... Make sure the lugs are all torqued properly!!!!

 

^ +1 torque up to 88lbs/ft and see.

 

Is it cold? They may be "flat spoting".

 

ive been having this problem too, im gonna take it to get an alignment and see what they say, i think you should do the same