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F10 / F11 (2011 - Current)
The new chapter in the highly successful story of the BMW 5 Series Sedan (F10) and wagon (F11)

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  #1  
Old 02-06-2011, 08:50 PM
Andrew OD Andrew OD is offline
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Running Flat on a RFT

Has anyone experienced a real life situation, in particularly with the F10, running on a deflated RFT? How far can you go, 5, 10, 25, 50 miles; and at what speed; what happens to the tire when it reaches its end point; Does it shred, fall of the rim? I cannot seem to find reliable answers to these questions.
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  #2  
Old 02-06-2011, 08:57 PM
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According to BMW website

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With run-flat tyres fitted, you can continue driving for up to 150 km (+-93miles) at a speed of up to 80 km/h(+-50miles) without any significant loss in vehicle stability. You not only save time and stress, you are also free of the need to carry a spare tyre, saving stowage space.
All driver assistants remain fully functional when driving with a loss of tyre pressure. The optional Adaptive Drive system redistributes the load to the other tyres, reducing the burden on the low-pressure tyre as much as possible. The wheel rims of run-flat tyres have special design that ensures the tyre will not detach from the rim, even on tight bends.
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  #3  
Old 02-06-2011, 09:09 PM
solstice solstice is offline
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I had a flat on an e60 loaner with RFTs. I drove it for about 50 miles with the flat after having tried to re-inflate it to no success. It's noticeable in handling and when looking at the tire that it is empty but if you take it easy it doesn't feel like the tire is about to climb out of the rim or shred.
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  #4  
Old 02-07-2011, 08:41 AM
anthony@empireleasing anthony@empireleasing is offline
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i have driven 100+ miles on the potenzas...i have plugged them...i burst 2 at once crushed my rims...done about everything and they held up...they stink to fix and cost tons of money but they do the trick...not sure what would happen vs regular tire though maybe regular tire wouldnt burst etc cause not as stiff.
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  #5  
Old 02-07-2011, 05:22 PM
emimix emimix is offline
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Quote:
Originally Posted by Andrew OD View Post
Has anyone experienced a real life situation, in particularly with the F10, running on a deflated RFT? How far can you go, 5, 10, 25, 50 miles; and at what speed; what happens to the tire when it reaches its end point; Does it shred, fall of the rim? I cannot seem to find reliable answers to these questions.
I drove with a deflated RFT for a week going 50 - 60 miles/h ... I hardly noticed the deflated tire during the first days ...until the car started to shake a title bit ! (see attached pic on the 7th day)

... I know the car has low-pressure warning system ...but I think my friend messed it up while he was playing with the i-drive a while ago!!!
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  #6  
Old 02-08-2011, 05:29 AM
x5 '08 x5 '08 is offline
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I hit a pothole on my f10 M sport this weekend and got a flat and bent my rim. Sat on hold with BMW sos for over half hour only to find out tow truck wouldn't come for a long while. So, I drove it another 15 miles back home. Although I heard a constant thump, tire maintained partial inflation and got me home ok. Fortunately I have BMW tire and rim insurance but apparantly that doesn't cover the $400 aligment I now need.
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  #7  
Old 02-08-2011, 03:56 PM
IBJanky IBJanky is offline
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I have AAA, so I wouldn't be worried about flat tires.

myke
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  #8  
Old 02-08-2011, 11:07 PM
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enigma enigma is offline
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Originally Posted by IBJanky View Post
I have AAA, so I wouldn't be worried about flat tires.

myke
So what happens when you get a flat 500 miles away from home on a Sunday evening? Try telling the AAA tow truck driver that you need your BMW hauled to a tire shop 500 miles away.
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  #9  
Old 02-09-2011, 01:21 AM
IBJanky IBJanky is offline
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Originally Posted by enigma View Post
So what happens when you get a flat 500 miles away from home on a Sunday evening? Try telling the AAA tow truck driver that you need your BMW hauled to a tire shop 500 miles away.
First off, if I had to be away from home for 500 miles, I'll be flying, not driving.

If for some reason I was far away from home (over 100 miles), and caught a flat, then I'd tow it to the nearest town with a tire place, spend the night at a hotel/motel and take care of it in the morning. Was that too hard?

AAA gives me 100 miles of free towing.

This isn't rocket science you know, you just need some common sense

myke
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  #10  
Old 02-09-2011, 04:35 AM
x5 '08 x5 '08 is offline
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Well, unfortunately my car has been at BMW since Monday and the rim is on back order. Fortunately this happened only 15 miles from my home. Had I been further away, it would have been far more inconvenient.
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  #11  
Old 02-09-2011, 05:41 AM
tdepetra tdepetra is offline
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Originally Posted by IBJanky View Post
First off, if I had to be away from home for 500 miles, I'll be flying, not driving.

If for some reason I was far away from home (over 100 miles), and caught a flat, then I'd tow it to the nearest town with a tire place, spend the night at a hotel/motel and take care of it in the morning. Was that too hard?

AAA gives me 100 miles of free towing.

This isn't rocket science you know, you just need some common sense

myke
Some of us - who also fly - like to take a 500+ mile road trip from time to time and not lose 1-2 days dealing with tire issues. BMW's arbitrary RFT/no spare design decision forces us to carry a spare (which I do) AND maintain AAA coverage (which I do) to have the peace of mind we seek. Yes there are other possible solutions like repair kits, sealants, etc., that may provide some safety net; however, your "one size fits all", "wasn't that simple", "not rocket science" attitude does not cut it for everyone.
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  #12  
Old 02-09-2011, 06:06 AM
Sophisto Sophisto is offline
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+1
For all my under 500 mile travels I prefer my F11 instead of another flying experience.
Driving is quicker, more comfortable and I do like it not to have to wait for others.
I would like to have a small spare with me all the time, just for being independend.
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  #13  
Old 02-09-2011, 07:18 AM
roybeasley roybeasley is offline
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The good news is that it works exactly as advertised - you can drive the car back to the dealership on a flat tire. The bad news: even the dealership doesn't keep these in stock, so you have to get a loaner for a day or two until the RFT comes in!
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  #14  
Old 02-09-2011, 08:19 AM
carnuts3 carnuts3 is offline
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As far as I'm concerned, a legitimate spare tire provides convenience and security when on the road. RFT's offer distress and inconvenience in many driving situations to say nothing about the poor ride they provide and the high cost to replace...that is, if you can readily obtain a replacement tire. If run flats were such a great idea, I believe more manufactures would be offering them.
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  #15  
Old 02-09-2011, 02:10 PM
Sophisto Sophisto is offline
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So, on a car you can buy almost everything one can dream of, a spare tire is not a possibilty, is something quite mysterious to me.
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  #16  
Old 02-09-2011, 02:59 PM
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Me530 Me530 is offline
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Its frustrating to contemplate having to buy an extra rim / tire and put it in the trunk for long road trips. And from what I can tell, you really don't have an option to get anything other than a low profile wheel/tire on the 535/550. Granted the wheels/tires look awesome but there is no practicality.
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  #17  
Old 02-09-2011, 04:19 PM
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dunderhi dunderhi is offline
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Quote:
Originally Posted by Me530 View Post
Its frustrating to contemplate having to buy an extra rim / tire and put it in the trunk for long road trips. And from what I can tell, you really don't have an option to get anything other than a low profile wheel/tire on the 535/550. Granted the wheels/tires look awesome but there is no practicality.
Maybe you don't need to keep it in your trunk.

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  #18  
Old 02-09-2011, 10:53 PM
IBJanky IBJanky is offline
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Quote:
Originally Posted by tdepetra View Post
Some of us - who also fly - like to take a 500+ mile road trip from time to time and not lose 1-2 days dealing with tire issues. BMW's arbitrary RFT/no spare design decision forces us to carry a spare (which I do) AND maintain AAA coverage (which I do) to have the peace of mind we seek. Yes there are other possible solutions like repair kits, sealants, etc., that may provide some safety net; however, your "one size fits all", "wasn't that simple", "not rocket science" attitude does not cut it for everyone.
That's too much paranoia for me. I'm too happy-go-lucky to worry about something as simple as a flat tire.

At most I carry tire sealants/plugs in the trunk and my AAA card in my wallet.

myke
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  #19  
Old 02-10-2011, 08:51 AM
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quackbury quackbury is offline
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Quote:
Originally Posted by IBJanky View Post
That's too much paranoia for me. I'm too happy-go-lucky to worry about something as simple as a flat tire.

At most I carry tire sealants/plugs in the trunk and my AAA card in my wallet.

myke
There's just so much here that doesn't add up.

You claim that you will let the local AAA tow truck driver tow you up to 100 miles. On what? Does AAA in CA guarantee you a flat bed?

The tow ends at a tire store in a small town. You really think they are going to have RFT's in the F10's size (and the brand that's on your car) in stock? And even if they do, you really think they are going to avoid the temptation to bend over Mr.-Fancy-Pants-BMW-Owner-From-Out-Of-Town-Or-Out-Of-State and charge you $750 to replace, mount and balance the tire, just because they can?

You do realize that, while RFT's CAN be plugged (regardless of what BMW says), once you drive on a deflated RFT it cannot be reused? And if you spray it full of the sealant, it is equally toast?

Come back here after you have your first flat, and tell us how the happy-go-lucky approach worked out for you.
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  #20  
Old 02-10-2011, 03:00 PM
hashas81 hashas81 is offline
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AAA needed?

why do u guys have AAA if new bmw comes with roadside assistance?
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  #21  
Old 02-10-2011, 08:39 PM
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dunderhi dunderhi is offline
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I love all of these scenarios people create to make a flat tire a matter of life or death. Please consider replacing these dire flat tire scenarios with - your engine dies. Does anyone carry a spare motor in their trunk to get them 50 miles to some sort of preceived safety? Everyone has their own comfort level with dealing with mishaps. Personally, I've had more cars with engine problems than I've had flat tires. Situations happen and people prepare and deal with them in their own way.

If I look own flat tire history, 99.9998% of the miles I have driven have been flat-free. I have driven RFTs for thousands of miles and dislike them immensely. I prefer the comfort and handling feel of the non-RFT. So, for the .0002% of the miles with a flat, I will rely on either my plug kit, my BMW Mobility Kit, my insurance company, BMW Assist, or friends and family to deal with the flat tire which 99.99% of the time will be less than 30 miles from home. If my engine dies, I only have my insurance company or BMW Assist; hopefully it's not on a Sunday night 500 miles away from the nearest BMW dealer.
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  #22  
Old 02-10-2011, 09:00 PM
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quackbury quackbury is offline
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Quote:
Originally Posted by dunderhi View Post
I love all of these scenarios people create to make a flat tire a matter of life or death. Please consider replacing these dire flat tire scenarios with - your engine dies. Does anyone carry a spare motor in their trunk to get them 50 miles to some sort of preceived safety? Everyone has their own comfort level with dealing with mishaps. Personally, I've had more cars with engine problems than I've had flat tires. Situations happen and people prepare and deal with them in their own way.

If I look own flat tire history, 99.9998% of the miles I have driven have been flat-free. I have driven RFTs for thousands of miles and dislike them immensely. I prefer the comfort and handling feel of the non-RFT. So, for the .0002% of the miles with a flat, I will rely on either my plug kit, my BMW Mobility Kit, my insurance company, BMW Assist, or friends and family to deal with the flat tire which 99.99% of the time will be less than 30 miles from home. If my engine dies, I only have my insurance company or BMW Assist; hopefully it's not on a Sunday night 500 miles away from the nearest BMW dealer.
Interesting logic, and pretty compelling. I'm 90% in agreement with you - a year ago it would have been 100%, but then I got 3 flats (two plugable nail holes, and one unrepairable monster piece of road debris) in a short period. All 3 happened on the X5's, so I did have a spare. But life would have sucked if I'd been driving my M3, or an F10.

The biggest issue I have is BMW's move to RFT's and their "logic" that you should never need a spare tire. Using your argument above, it's as if they are saying "We realize that engine failures can and will happen. So we are going to equip your car with a REALLY CRAPPY motor that weighs a ton and runs rough. But it does have a really good limp home mode." John Deere, anyone?

Yes, I stretched that analogy to the breaking point, but it's the best I can do at midnight.....
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  #23  
Old 02-10-2011, 11:59 PM
Sophisto Sophisto is offline
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Quote:
Originally Posted by dunderhi View Post
I love all of these scenarios people create to make a flat tire a matter of life or death. Please consider replacing these dire flat tire scenarios with - your engine dies. Does anyone carry a spare motor in their trunk to get them 50 miles to some sort of preceived safety? Everyone has their own comfort level with dealing with mishaps. Personally, I've had more cars with engine problems than I've had flat tires. Situations happen and people prepare and deal with them in their own way.

If I look own flat tire history, 99.9998% of the miles I have driven have been flat-free. I have driven RFTs for thousands of miles and dislike them immensely. I prefer the comfort and handling feel of the non-RFT. So, for the .0002% of the miles with a flat, I will rely on either my plug kit, my BMW Mobility Kit, my insurance company, BMW Assist, or friends and family to deal with the flat tire which 99.99% of the time will be less than 30 miles from home. If my engine dies, I only have my insurance company or BMW Assist; hopefully it's not on a Sunday night 500 miles away from the nearest BMW dealer.
You are making a small mistake here. With a motor problem probably you have no alternative but to have a techncian help you out. A flat tire would be dealt with 100% independed when there was a spare in the car. All the time, with or without ruined runflats or real tires, even on a mondaymorning at 3 am, 400 miles from home. It's not the ods that are descicive here it's all about being selfsupporting for a small price by a very well astablished sytem, namely carying a spare tire with you......

Last edited by Sophisto; 02-11-2011 at 12:02 AM.
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  #24  
Old 02-11-2011, 11:28 AM
roybeasley roybeasley is offline
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I've had my 2011 528 for 2 months and just had my first RFT flat. Now the car's at the dealership for 2 DAYS waiting for a replacement tire.

I've not seen it explicitly stated, but is there really a viable option of a non-RFT tire replacement? Can a "regular" tire be put on the car?
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  #25  
Old 02-11-2011, 11:45 AM
tdepetra tdepetra is offline
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Originally Posted by roybeasley View Post
I've had my 2011 528 for 2 months and just had my first RFT flat. Now the car's at the dealership for 2 DAYS waiting for a replacement tire.

I've not seen it explicitly stated, but is there really a viable option of a non-RFT tire replacement? Can a "regular" tire be put on the car?
Yes, a regular tire will fit on the car. Dealers will tell you the car was designed for RFT, implying RFTs are needed for handling, safety, etc. This is not totally accurate. Of course the car was designed for RFT -- they didn't leave a space for a spare!!

In the real world, I believe there are tons of people who have already switched out their RFTs to non-RFTs in the correct size and profile who are getting crisp, BMW-like handling with increased comfort and reliability. They have had to make additional compromises (myself included). The added safety of RFTs that BMW claims is debatable, and I'm no safety expert. I tend to believe that their policies of voiding their wheel and tire insurance coverage with the use of non-RFT tires and all non-approved tires, is as much driven by their legal department as it is by their safety or design engineering department. IMO, their design decision in favor of RFTs without any other option was largely motivated by the weight and associated regulatory fuel consumption mandates and cost.
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