Bought new 17" wheels (-2 size) and General Altimax Arctic Winter tires from TireRack.
But now the car handles like a boat at highway speeds. Will be checking alignment. Anyone have any ideas why there would be such a difference in handling.
Sidewall thickness plays a lot in handling - bigger sidewalls absorb more harshness, giving a softer feeling ride and less responsive to steering input (due to flex of sidewall). Probably not all that noticeable for normal driving, but maybe more pronounced at highway speed or on the track.