did you go with the stock tire size for the 4S? always considered it when I had my m340i but sold it before I could get some new tires on it
On my m340i I swapped out the factory all-season runflats for regular summers (I put on Bridgestone S04’s since they were cheaper than PS4S and it was a lease) and the difference was huge. Unfortunately my car was optioned with the non-staggered wheel/tires (225s all around).
Yes I have the 225 all around non staggered setup. They said I could have maybe gone a little wider in the back but I don’t want to risk it.
Regardless the difference is drastic.
If I remember right BMW will expect run flats when you return the car.
Probably I saved the two front which where still fine so worst case. I buy two used to return the car.