Runflats
12-29-2006, 09:13 AM
#31
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Originally Posted by KAF' post='372119' date='Dec 29 2006, 05:40 PM
It is my personal choice, shared by a signifigant number of others that the benefits of RFT's are outweighed by the disadvantages.
Not so much reported (as far as I can see) for those with 17's.
Of course on the 550i's the larger wheel size is a given.
ABC
12-29-2006, 12:34 PM
#32
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My Ride: F11 535i M-Sport,, Silver, Black Leather, LED Adaptive headlights
Model Year: 2015
Engine: N55
Originally Posted by aybeesea' post='372129' date='Dec 29 2006, 06:13 PM
But what set of significant others? My "guess" is that it's those with the larger wheels/rims that are having more of the problems.
Not so much reported (as far as I can see) for those with 17's.
Of course on the 550i's the larger wheel size is a given.
ABC
Not so much reported (as far as I can see) for those with 17's.
Of course on the 550i's the larger wheel size is a given.
ABC
Mine are 17's
12-29-2006, 01:34 PM
#34
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My Ride: F11 535i M-Sport,, Silver, Black Leather, LED Adaptive headlights
Model Year: 2015
Engine: N55
Originally Posted by aybeesea' post='372198' date='Dec 29 2006, 10:10 PM
And DMS'd...
ABC
ABC
Your point is ??
12-29-2006, 02:15 PM
#35
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Questions:-
Anyone had similar experiences with Runflats?
Do Runflats get better with age ?
What pressure do people run in the tyres ?? (I found it less harsh at 32psi)
Is the harsh ride solely due to the runflats, or is it the springs or the shocks
Eg 70% runflat, 20% springs, 10% shocks ???
Anyone got BMW to change anything eg springs to SE etc
Answers
1. Yes, exactly the same.
2. No, not one bit.
3. Don't do it, you are guessing and using ride feel as your test. Stick to sticker pressures.
4. 90% runflats.
5. Not a chance and it will make little difference, I have an SE, same problem, only solved by dumping the thumpflats.
Anyone had similar experiences with Runflats?
Do Runflats get better with age ?
What pressure do people run in the tyres ?? (I found it less harsh at 32psi)
Is the harsh ride solely due to the runflats, or is it the springs or the shocks
Eg 70% runflat, 20% springs, 10% shocks ???
Anyone got BMW to change anything eg springs to SE etc
Answers
1. Yes, exactly the same.
2. No, not one bit.
3. Don't do it, you are guessing and using ride feel as your test. Stick to sticker pressures.
4. 90% runflats.
5. Not a chance and it will make little difference, I have an SE, same problem, only solved by dumping the thumpflats.
I read some other posts that suggested the normal tyres were cheaper to run in the long-run.
Anyone done any calculations on this?? (I ordered the space-saver spare with the car - as I had heard of several cars being off the road while a replacement tyre was ordered.)
Can't wait now for some Michelin Pilot Sports - I'm still convinced that the BMW engineers new what they were doing - and by all accounts it seems that these could make all the difference.
12-29-2006, 02:43 PM
#36
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Tramlining is when you are missing your e39 so much. You have such high expectations of the e60 and it looks so good in those big 275 35 18s and then you have too drive it. Then it hits you runflats aaaaagh! You think it will get better but it doesnt. Theres nothing else to do just head for the tramline and leave it for the next train to wreck it. No more runflats.
I think thats where the saying tramlining comes from!
Just checking the timetables.
I think thats where the saying tramlining comes from!
Just checking the timetables.
12-30-2006, 12:09 AM
#38
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My Ride: F11 535i M-Sport,, Silver, Black Leather, LED Adaptive headlights
Model Year: 2015
Engine: N55
Originally Posted by gcc_too' post='372210' date='Dec 29 2006, 11:15 PM
Thanks for the replies - looks like I'm stuck with them for a while - I'm amazed you have the same issues with the SE
I read some other posts that suggested the normal tyres were cheaper to run in the long-run.
I read some other posts that suggested the normal tyres were cheaper to run in the long-run.
This puts them in a difficult position, if the manufacturers say not to repair them, but they do and them the repair fails with tragic consequences, the tyre shop have a major legal problem. So the days of getting any runflat fixed are limited.
In terms of rolling resistance / MPG, non runflats will give you no benefits, if anything RFT's are likely to have lower rolling resistance due to firmer sidewalls and harder tread compunds absorbing less energy.
12-30-2006, 01:42 AM
#39
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Originally Posted by KAF' post='372293' date='Dec 30 2006, 09:09 AM
In terms of rolling resistance / MPG, non runflats will give you no benefits, if anything RFT's are likely to have lower rolling resistance due to firmer sidewalls and harder tread compunds absorbing less energy.
ABC
12-30-2006, 01:45 AM
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Originally Posted by colejl' post='372224' date='Dec 30 2006, 12:05 AM
Obviously that more power makes runflats shite... 
I'll be trying to see how shite I am too in the future.
ABC