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View Poll Results: Do you love or loathe your run-flats?
Worst thing ever invented and a pain in the back! 9 42.86%
Compliant ride and feeling of safety! 12 57.14%
Multiple Choice Poll. Voters: 21. You may not vote on this poll

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      10-02-2008, 09:58 AM   #1
bigmondy
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Run Flats on the 1'er M Sport

How do we feel about them?
  1. Worst thing ever invented and may result in lumber pain?
  2. Don't really mind the compliant ride - worth it for the additional safety benifits.
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      10-02-2008, 10:02 AM   #2
pit1
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Hate them, but for now, without a spare I'll take the security over performance. I like the added safety when my wife has it. I wouldn't mind dealing with fix-a-flat on the side of the road, but I'd prefer my wife be able to drive to safety.

I'm all ears for reasonable methods to deal with lack of spare though.
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      10-02-2008, 11:12 AM   #3
esscolab
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Have no gripes, but then again I'm interested to try normals when these need changing...
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      10-03-2008, 05:43 AM   #4
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They are terrible compared to non-RFT good quality tyres.

The sidewalls are too hard, in cold and wet weather they have appalling low levels of grip, and I actually think they are quite dangerous when the tyre temperature is cold too.

In dry weather they fair better and grip is good, but this winter will be interesting.

I have no issues with ride quality etc.

I am two minds about changing to non-RFT's as:

- I Like the protection of RFT's, especially on the motorway
- No spare tyre
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      10-03-2008, 07:18 AM   #5
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Quote:
Originally Posted by moff View Post
- No spare tyre

the 'spare' in our VW Touran, is a can of gunky foam!
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      10-07-2008, 03:21 PM   #6
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I like them i have to say....makes me feel i can go faster knowing i have that safety if they suddenly blow as well...
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      10-08-2008, 02:32 AM   #7
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Trying to find a set of runflats to fit the 261M wheels and I 've only come across Bridgestones (215/40/R18 -Front, 245/35/R18-Rear)

Anyone else running on a different set of runflats for the 261 wheels or is it just Bridgestone only ??
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      10-08-2008, 02:50 AM   #8
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i've heard of people using michelin ps2 runflats, but they still suck. the wheels can accomodate 225 front and 255 rears. i know goodyear makes eagle f1 runflats, like i had on my vette, but don't know if they come in 225/255.
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      10-13-2008, 05:18 AM   #9
bigmondy
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Thanks guys. On the strength of this I have left them on my 3 door Le Mans Blue 118d M sport coming next month. Was about to order normal tyres instead.

Although I must say - the comment about them being Dangerous in the cold is worrying - has there ever been an expert investigation into this?
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      10-13-2008, 05:46 AM   #10
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Quote:
Originally Posted by pit1 View Post
Hate them, but for now, without a spare I'll take the security over performance. I like the added safety when my wife has it. I wouldn't mind dealing with fix-a-flat on the side of the road, but I'd prefer my wife be able to drive to safety.

I'm all ears for reasonable methods to deal with lack of spare though.
BMW offer a kit for their M cars, it called mobility set (see link) and comes with repair gunk and an air pump that plugs in the ciggy lighter socket.

http://www.realoem.com/bmw/showparts...34&hg=71&fg=95
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      10-13-2008, 10:44 AM   #11
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Quote:
Originally Posted by bigmondy View Post

Although I must say - the comment about them being Dangerous in the cold is worrying - has there ever been an expert investigation into this?
Dangerous is a strong word to use, but this is more related to the 135i with 300 torques and horses going through the rears from 1300 rpm it can easily catch someone out if they are not used to RWD.

It was my fault and I should no better coming from 2 S2000's, but I planted the throttle coming out of a bend overtaking and the rear seriously slipped out with the DSC on. I was shocked how easily it happened, especially as I had been driving for 20 minutes at 60mph+.
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      10-13-2008, 12:09 PM   #12
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Quote:
Originally Posted by UK135i View Post
I like them i have to say....makes me feel i can go faster knowing i have that safety if they suddenly blow as well...
I think that may be a false sense of security. RFT's should not be driven at high speeds if they are low, and expecially not if you have a blowout. A blowout at high speeds is not safe with any tire, as the rolling resistance will cause the car to swerve suddenly. Make sure to have DSC on at all times.

RFT's are meant to be driven at a max speed of 50 Mph for up to 50 miles only to get you to the nearest tire shop or dealer for a replacement. A $50 AAA or CAA membership is probably a better deal, then paying the uplift for RFT's.
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      10-15-2008, 06:19 PM   #13
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Quote:
Originally Posted by Lester View Post
I think that may be a false sense of security. RFT's should not be driven at high speeds if they are low, and expecially not if you have a blowout. A blowout at high speeds is not safe with any tire, as the rolling resistance will cause the car to swerve suddenly. Make sure to have DSC on at all times.

RFT's are meant to be driven at a max speed of 50 Mph for up to 50 miles only to get you to the nearest tire shop or dealer for a replacement. A $50 AAA or CAA membership is probably a better deal, then paying the uplift for RFT's.
I didnt mean it like that....i know how you are meant to drive them when they blow out. It is the fact that if you suddenly have a puncture at 70 with runflats it would be safer for the driver than without run flats (your less likely to crash in other words) which in my mind is better and safer....sorry i did not explain it like that the first time:w00t:
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      01-28-2009, 12:40 PM   #14
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The only reason they are still on our 130 is the fact it's my wife's car and it saves her (and our two young kids) sitting at the side of the road if there's a puncture. Got the Goodyear RFTs on the 5 spoke 218M's and wet/cold/bumpy roads they are shockingly bad with the traction light on a lot, even when my wife drives.



I swapped the wheels and tyres for a set of ACS Type3's (as above) with normal Bridgestones on for a trip the the Nurburgring (was last year before I got the M3) and it transformed the car... not a little, a huge amount. Just chucked a couple of cans of TyreWeld in the boot.
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      01-28-2009, 02:41 PM   #15
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better on coupe and conv!
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      02-15-2009, 04:24 PM   #16
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can anyone help i have a 123d sport m coupe , 10 month old now , had to have a tyre 1 month ago at £150 fitted from motosave front, size 215 40 18. just had to have a rear 245 55 18 , none at motosave , very scarce apparently , had to have one fitted at bmw , cost £260, anyone any ideas on alternatives ? thanks ... Ken Leeds England
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      02-16-2009, 07:27 AM   #17
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I would never advise having two rear tyres with different tread depth.

Max would say is less than 2mm difference.
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      06-04-2009, 09:35 PM   #18
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My wife's 335i has run flats and my 135i on order will have them too. I'll give up a tiny performance blip to know that whichever car she drives, she'll never have to sit on the side of the road. Personal safety is #1 in my book.
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      06-26-2009, 05:56 AM   #19
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I just called my dealer to ask if they could do me a favour and not put runflats on the car from the factory. The answer was a plain and simple no so I will look into changing them straight away and then selling them.

I don't see the point in spending a fortune on a car with good pace and respectable handling and then putting 'safety' tyres on it. I accept that for the other half some may wish to have the added security that comes with them but I don't. You can buy a compressor in Tesco for £6 and I already have cans of tyre weld. This would be my prefered option but I am not sure it is legal.
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      06-26-2009, 08:20 AM   #20
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Its not even runflats that are the issue. Its Bridgestone Runflats! I have Pirelli runflats as my winter tires and I did not loose one after months of snow, ice, potholes, and NY roads.

I also had more grip with my winters.
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      06-26-2009, 09:05 AM   #21
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Quote:
Originally Posted by bigmondy View Post
Although I must say - the comment about them being Dangerous in the cold is worrying - has there ever been an expert investigation into this?
Don't be fooled......even non-run flat, summer performance rated tires lose grip when cold. It's more a function of tread compound than sidewall stiffness. I almost looped my wife's Cayman on a very cold day with very cold tires, and that car has non-fun flat PS2's on it and handles better than my 135.
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      09-20-2009, 04:16 AM   #22
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Hi
A friend of mine has a 135i with dunlop run flats, these ride much better than my 123d with bridgestone run flats. wheels and tyres on both cars are the same size. When the bridgestones on my 123 need changing i'll be putting dunlops on
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