Might it be possible that what you are feeling is tramlining. I know high performance summer tires with a lot of grip can make a car feel a bit squirrly as the tires tend to follow the ruts and grooves in the road. I know when I had some super sticky Pirrelli tires on my car it was almost un-driveable on the frost heave pot hole laden things we call roads in New England.

 

Geo,

In your post you used the term "still feels". I therefore infer that you had the problem prior to the new tires.

Perhaps you should be looking at steering and suspension links/components. Probably the sooner the better.

 

Geob,

What are you finding out? Do let us know how you sorted out the problem. That way we all share and learn.

 

Whoops,

Thought this thread was about my ex wife .

 

This sounds like the symptoms of worn control arm bushings. Just get someone to check the suspension, it's nothing fancy. I sure would not want to feel like I was driving a dangerous handling car. It would be unusual for new tires to tramline. This behavior usually begins with low profile tires that are about 1/2 to 3/4 worn.