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Thank you for the replies and comments.
I made a mistake as DBU mentioned the 20" staggered Michelin Pilot Super Sports that came on my M40i are not run flats, even though it did not come with a spare. Some how I managed to think the BMW used these as run-flats stock on this setup.
Anyway the main AS tires I am interested in do not offer slightly taller and wider sizes for these wheels. Seems I have to a tougher decision to make. lol
I don't necessarily "need" wider rears, but the stock 275 seems a little stretched on there compared to the stock 245 fronts.
stock 245 on 8.5 inch wheel = 29mm total tire "overhang"
stock 275 on 10 inch wheel = 21mm total tire "overhang"
285 on 10 inch rear wheel = 31mm total tire "overhang" which is much closer to the front (not as stretched).
So far I am leaning towards the M. PS A/S 3+. Which I read should be a little softer then the M.PSS in same size and certainly better for my weather. In the stock size front and a 285 rear.
Thx again!
Geo
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