Hi, I have Pirelli P7000 Supersports on my Hamann HM2s 18 x 8.5 and quite frankly they suck. Now has come the time to replace my rear tires, and I do not want to use the same ones. The fronts still have plenty of tread left, so I want to keep them until they wear out. My question is, will I be able to use something like the S-02 PP in the rear and still be able to keep the Pirelli's in the front? Will anything happen if I do this? And what is the widest I would be able to go in the rear with my rims? My fenders are already rolled... thanks for any help in advance