Removing run flats

Quadracer said:
TitanTim said:
BMW set up and tune the suspension so it works correctly with runflats which is why I wouldn't change to standard rubber :)

Tim.
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Yes I saw them quite often checking the set up on British Roads :poke:
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It was a tough decision by Her BMW, fit RFs for Men or normal runner for Mice, they chose the former :driving: :poke:

Tim.
 
Run flats are a load of crap, There main function is not to go completely flat when punctured and then secondly worry about how the car handles and rides, I would prefer good handling and ride and ring the AA when I have flat, These are just may thoughts of course, :)
 
Kettleboy said:
M cars don't have them, discussion over......
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Exactly and they shouldn't be on the 35is either. Mine was skipping about all over the place with them on. I would be interested to know how BMW get 4.8 to 60 with them on. Launch control was a joke with them on.
 
api330 said:
Run flats are a load of crap, There main function is not to go completely flat when punctured and then secondly worry about how the car handles and rides, I would prefer good handling and ride and ring the AA when I have flat, These are just may thoughts of course, :)
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+1 The only good thing about these tyres is that they can still get you home in the event of a puncture. They are a compromise, mainly towards safety. BMW can do what they want with the suspension setup, but as a performance tyre they are rubbish. Though as a saving grace they do ride much better on the E89 than the E85. I also believe they are responsible for most of the cracked alloys people have suffered from because of the lack of give in the sidewalls, with all the energy from hitting a pothole for example going straight through the whole wheel and not being soaked up by the tyre.
 
My car is not quite the same as yours, but I recently changed from the Conti 'all season' run flats that came on my car when I bought it (used) to BF Goodrich Rival non run flats. The new tires have really excellent grip but I did not notice any significant difference in ride quality. The BFG tires probably have fairly stiff sidewalls though. (I now carry a repair kit in my car in case I need to plug a tire.)
 
Just to play devils advocate... What would you expect from your insurance company if you had a blow-out on the motorway and it chucked you into the barriers. I would assume if you've informed the insurer you will be ok,but I for one would defiantly have it in writing the car was originally on run-flats and it had been fitted with non run-flats.i can see an insurance company wriggling on that one. I also seem to remember there is some legislation regards altering tyre sizes on cars upto a certain age? It was quoted to me when changing tyres on the daughters car some time ago. (Under 3years old have to retain the OE size tyre for the rim?)
 
Tonybz said:
Just to play devils advocate... What would you expect from your insurance company if you had a blow-out on the motorway and it chucked you into the barriers. I would assume if you've informed the insurer you will be ok,but I for one would defiantly have it in writing the car was originally on run-flats and it had been fitted with non run-flats.i can see an insurance company wriggling on that one. I also seem to remember there is some legislation regards altering tyre sizes on cars upto a certain age? It was quoted to me when changing tyres on the daughters car some time ago. (Under 3years old have to retain the OE size tyre for the rim?)
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I think so long as you inform your insurer and it's recorded by them you should be ok. I can understand why people change them as they want a comfy ride and perhaps down to cost. I'm not convinced on the handling side unless you drive like a loon. I still prefer the safety angle RFs instill where you get a normal puncture, much prefer to carry on with my journey than faff at the side with a can of foam in a potentially dangerous situation.

Tim.
 
Out of interest, those of you swapping out run flat tyre what generation of the bridgstone run flat where they, as I noticed a new version came out in 2009.

Does the Tyre Pressure monitoring still work on non run flats?

If I do take out the BMW tyre insurance, what would happen if I decided to change to non run flats?

If I decide to bite the bullet on day one, what can I sell a very low millage set of run flats for?

Thanks
Chris
 
Out of interest, those of you swapping out run flat tyre what generation of the bridgstone run flat where they, as I noticed a new version came out in 2009.
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I have stuck with RFT but switched to Michelin Pilot Sports .When I changed in 2012 the only relevant Bridgestones where the same RE050s factory fitted in 2007 and IMHP the main issue with "Run Flats "

There was much talk about the next Gen RFTs over last few years but not seen any sign of anything in Z4 sizes and RFT even now from Bridgestone
 
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