If your planning on running 19" then non run flats are so much better certainly on an 06-10 car. Ive driven/owned a couple and will never have RFTs on any bmw. I love a sporty ride but on 19" the ride is IMO awful. I replaced 17" RFT with non run flats on SE suspension and the ride was not taught enough for me but on m sport 18" or 19" there is no debate. You wont regret it.
Goodyear eagle F1s i had were good but im keen to try 452s next time.
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