I replaced the OEM Pirelli Cinturato P7 r-f 225/50R17 94W runflats on my x1x28i with a new Sparco wheels and set of Michelin PSS in the size: 225/45ZR-18 on front & 255/40ZR-18 on the rear. Now I'm testing.
- grip on dry surface is better
- more comfort in daily driving
- you can use more force in braking, before start abs (i think, it might be a good reason to change oem brake pads
