Shahram: A while back were you looking for a Pirelli P Zero 335/30 ZR18 tire? I think you said you had found a nail in your original tire. I am also looking for this tire as I had the "nail" problem also. These tires seem to be hard to find. Can you substitute the same size in the "Rosso" model? what is the diff between the Rosso and the original? thanks!