I have a two week old 330i with PP & SP that came with Dunlop 8080 E. My first question is why do they have 225/45/17 on front and 245/40/17 on back? Why wouldn't they at least run the same series (40) on all four? My second question is whether or not having a plug/patch performed my town fair tire will effect the handling of my tire (I had a screw in my rear tire sat am and had to get it fixed!) Third. what do you think of the Dunlop 8080 E?