My OEM Bridgestone Run-Flats lasted 20K miles with maybe 2 or 3K left. The OEMs became noisy at about 8K miles and progressively got louder. I finally gave up on them and put on a set of Continental DSW's non run-flats. The X5 was transformed. I could now hear engine noises that had been masked for 10K miles. Purchased the tires (20" stagggered) at Discount Tire for $1200.00+ out the door. I'm smiling.

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DeanLinAZ
2011 X5 35i, Sport Activity
Black Sapphire/Oyster
M Sport, Tech & Conven packs
Premium sound, Side camera opt