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BMW 3-Series Run Flat Tires

2420 messages,  Last post on Nov 29, 2009 at 8:10 AM

You are in the BMW 3-Series Forum. Your Hosts are pat & karens

What is this discussion about? BMW 3 Series, Tires


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#1263 of 2420
Re: Why get a new tire after a nail? [Mr_Shiftright] by adethier
Aug 11, 2007 (11:47 am)
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Replying to: Mr_Shiftright (Aug 11, 2007 10:55 am)

driving at night in the desert is even the worse case scenario as when RFT blows, the will soon after break down and decompose as ours did after 40 miles... crappy technology if you ask me! (here's the full story: http://h-otch-p-otch.blogspot.com/2007/04/bmw-with-run-flat-tires.html)
#1264 of 2420
Re: Why get a new tire after a nail? [adethier] by Mr_Shiftright HOST
Aug 11, 2007 (12:48 pm)
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Replying to: adethier (Aug 11, 2007 11:47 am)

oops! That link seems busted.
#1265 of 2420
Re: Why get a new tire after a nail? [Mr_Shiftright] by circlew
Aug 12, 2007 (6:44 am)
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Replying to: Mr_Shiftright (Aug 11, 2007 10:55 am)

You are correct! This does not serve the customer and is wasteful to boot! But...Conti RFT's are $146 at tire rack for the 17". I assume additional mfgr. RFT's at a reasonable price will become available for the other diameter rims going forward.
 
What I would envision for the future is an RFT that could also be repaired. If the cost is more, the ability for repairing a "typical flat tire" would mitigate some of the added cost.
 
In other words, the EL-42 tire I kept which suffered from a simple puncture (from a screw in the middle of the tread) should have been road worthy after repair DESPITE the fact I drove on it for 100 miles. There is no visible sidewall/tread damage or visible stress to the inner tire. The story is inside of the rubber. This is a waste at this point in the technology. The advantage to me was it got me to my destination during a zero pressure event.
 
Regards,
OW
#1266 of 2420
Re: Why get a new tire after a nail? [circlew] by nkeen
Aug 12, 2007 (5:35 pm)
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Replying to: circlew (Aug 12, 2007 6:44 am)

..no doubt about 100 miles out in the desert, but getting stuck with a flat on the Cross Bronx Expressway doesn't appeal either.
 
And a 50 mph limit is just that. I frequently see cars with a donut on being driven at 65 to 70.
#1267 of 2420
Re: Why get a new tire after a nail? [nkeen] by Mr_Shiftright HOST
Aug 12, 2007 (5:47 pm)
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Replying to: nkeen (Aug 12, 2007 5:35 pm)

Well I wouldn't MIND a RFT, but I would mind paying for it after every flat.
#1268 of 2420
Re: Why get a new tire after a nail? [Mr_Shiftright] by rhmass
Aug 14, 2007 (6:51 am)
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Replying to: Mr_Shiftright (Aug 12, 2007 5:47 pm)

I am not sure people should follow the recommendation to the letter. That is; replacement after each flat. BMW doesn't recommend repair for the non RFT either according to the manual. It is for the liability reason. The way to handle this matter is based on common sense. I had a nail on the RFT tire and drove it for 35 miles. The nail was right in the center, so I had it plugged. It has worked fine. Had I have to drive 100 miles to get help, I probably want to replace it. The whole idea of having a tire pressure monitor built in is to help you learn about the problem early on to take proper measures, IMO.
#1269 of 2420
Re: Why get a new tire after a nail? [rhmass] by circlew
Aug 14, 2007 (6:57 am)
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Replying to: rhmass (Aug 14, 2007 6:51 am)

It seems to make sense but I would not advise repairing/reusing after running any tire with zero pressure for any given distance. The reason is non-visible damage to the inner belts that is not apparent could result in a very unsafe event going forward at any given time. It's just not worth the risk, IMHO.
 
Regards,
OW
#1270 of 2420
Re: Why get a new tire after a nail? by actualsize
Aug 14, 2007 (7:44 am)
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Yes, but the key phrase here is zero pressure. In the Mini example I gave in post #1252 we never let the tire get anywhere near that point. It never ran flat, or even severely low. Fixing a nail-hole in an RFT or any other tire is technically fine in a case like that.
 
But some dealers and tire stores are hiding behind lawyers and telling folks they can't be repaired AT ALL. Since they can't know the tire's run-flat history before they get their hands on it, I guess I can understand that POV. But it also feels like an excuse to sell more tires.
 
If carmakers and retailers who deal with RFTs hold the "cannot repair" line firm in simple nail-hole cases like the one cited above, count me out - especially at the current x2 or x3 price premium.
 
TPMS is where the lion's share of the benefit lies anyway.
#1271 of 2420
Its not that complicated by jbrock22
Aug 14, 2007 (11:11 am)
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Simply carry tire goop and a mini compressor. Use the goop, add air, off you go. If the punture is that large that the goop does't hold pressure, the tire is history anyway. Do not drive on a RFT without air pressure, unless you want to purchase a new one. RFT tires are fixable just as any GFT tire is. Next subject.
#1272 of 2420
Re: Why get a new tire after a nail? [actualsize] by Mr_Shiftright HOST
Aug 14, 2007 (11:16 am)
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Replying to: actualsize (Aug 14, 2007 7:44 am)

The tire experts tell me that if your monitoring system is not accurate, or if you are not paying STRICT attention to the pressures, you will experience premature wear and noise with RFTs.
 
I'm still inquiring from expert tire shops in my area (those who do high end cars, racing cars, etc) as to what's what with repairing an RFT---the do-s and don't-s.

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