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PSS have a smoother ride, grippier overall and infinitely better on wet than the PS2. On dry surface at least majority believes PS2 have better turn-in and I think they are also really good in braking, maybe even better than PSS. They have similar steering response on normal roads.
Being also cheaper and lighter plus arguably more tread life, they are a no brainer in almost all real world driving conditions for the 1M which has too much torque to handle at the rear. There is a significant rear traction difference between these two imo. However, they are not a track tire and you may need to find the good pressure with them (which may be different than PS2) in addition to break-in. They are really good after break-in and maybe for the first 10,000 km. stay at peak of their performance. When they start getting harder after 2 years even with little mileage they start loosing their mojo a bit.
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"The mark of a great car is one whose overall competence exceeds what you should expect from its individual components and the 1M does just that", Chris Harris.
BMW 1M-SOLD-: TECH: Evolve Race+N55mids, Evolve IC, Michelin PSS, ER cp, aFe filter, CDVx, Vorshlag camber plates, BMS OCC EXTERIOR: trunk spoiler, blacklines, black grills, IND goodies INTERIOR: Alcantara steering wheel, steel pedals, custom mats, MPower e-brake.
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