Mike,

Big piece of information is missing... what exactly was the condition of the road?

I ask this because the stock Continental tires on our cars have always exhibited a tendancy to 'squirm' on grooved pavement. As these tires wear at the shoulders (normal for 50,000 miles) this behavior becomes more pronounced.

Also check tire pressures, on dry pavement you can notice more of this squirm if one of the tires is 3 - 5 pounds low on pressure. This seems to create a 'teeter/totter' affect in the balance of the vehicle. I have fiddled a bit with the pressures but found that the mfr recommended higher pressure gives significantly better handling but at a cost of additional harshness and more tire noise.

Going to try a set of Michelins next spring when I take off the snow tires and rims. Several posts here have indicated that they ride a little better than the Continentals and may be quieter as well.

Good luck