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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Wheels and Tires -- Sponsored by The Tire Rack > Run-flat or non-run-flat tires?
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      06-22-2020, 12:41 PM   #45
johnung
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I bought my M240i 2 maybe 3 weeks ago. I bought it in another city, about a 250-mile drive. On the way home I found myself wondering why the tires were so loud. After driving around for a bit I wondered, why does it ride so rough in comfort mode? In my life, I have owned everything from Mustang GT's to corvettes to Jeep Wranglers and many 4x4 pickups. To sum up the way this BMW drives, imagine if you will, The Flintstone's humming along on 4 rocks that are not entirely smooth. Then I discovered the dealership had placed Bridgestone S001 RFT's on the car. They are louder than the Nitto and Toyo AT tires on my Jeep and F150 FX4 while being less compliant than 305/55/20's. I will NEVER own an RFT tire again. They are shockingly bad.
Since you just picked the car up, first thing I'd do is check the tire pressure. Dealers are notorious for over-inflating tires, making the car feel really stiff and harsh; don't know why they do this. Second, before you write off RFT, run them in for about 1000 miles. My experience is that they will quiet down a lot after that. Given a choice, I'd always opt for RFT, if only for the safety and convenience of being able to limp home IF I experience a flat. Had it happen once while in a different city and easily got to a dealer for a quick repair.
How far did you have to go to a dealer on this 'flat' run-flat? I have heard that if you 'limp' somewhere that is 30-50 miles, the run-flat tire is no longer useful and, depending upon condition of other tires, you might have to purchase at least two new run-flat tires. Is this true, and if so, in my opinion, that is a BIG negative fortune-flat tires.
Yup, that's pretty accurate
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      06-22-2020, 12:57 PM   #46
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How far did you have to go to a dealer on this 'flat' run-flat? I have heard that if you 'limp' somewhere that is 30-50 miles, the run-flat tire is no longer useful and, depending upon condition of other tires, you might have to purchase at least two new run-flat tires. Is this true, and if so, in my opinion, that is a BIG negative fortune-flat tires.
To add this scenario, after limping to a location where you can get help, the chances of any tire shop keeping run flat tires in stock are slim. Factor in anywhere outside of a major metro area and the chances of you finding a run flat are probably 0. You'd end up buying non-runflat tires simply to continue on your journey.
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      07-01-2020, 02:04 AM   #47
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Thanks for all this info, I’ll be ditching my run flats very soon!
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