On the fronts I have the OEM Potenzas with about 3K miles on them on the rear I have new Falken Ziex 512s. Original factory size with 17" rims.

Now the car rides like if the rear is lagging behind or floating kind of when you turn like when changing lanes or merging onto the interstate...WTF?

Is this normal? Does it have something to do with the softer Potenzas up front and the harder tread Falkens on the back?

Was wondering if someone can explain this.

THanks!