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I agree with the last comment. From day one I felt the 704 in my 540ix was too stiff. Maybe 70% of the time on our crappy local roads. Switched out the run-flats for Pirreli AS+3s and felt the ride too stiff maybe 50% of the time. At the advice of a forum member, dropped the tire pressure to 32psi all around and the ride is too stiff 30% of the time. I can live with that.
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