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Originally Posted by Yoko' post='405938' date='Mar 23 2007, 10:09 AM
Get the Run Flat Tire :)..
http://www.bmwusa.com/vehicles/X5/48...ightDetail.htm ---> you can see the benefit from RF tire here. :) 'They can be driven for up to 150 miles at reduced speeds.' - What this means, if you look into the webiste further, is that with 4 passengers and a loaded trunk, you can drive up to 30 miles. you only get 150 miles with driver and no luggage. 'Due to low profile tires, please note: Wheels, tires, and suspension parts are more susceptible to road hazard and consequential damages.' - A number of members here reported damaged rims after hitting potholes, the supporters of RFT's argued that it had nothing to do with the tyres - This is the first time I have seen this warning from BMW. All the puctures I have had, have involved slow deflation that has been picked up by the pressure monitors before the pressures dropped too low. Explosive blow outs are not that common. There are circumstances where the RFT is a clear safety advantage, there are others where it is not ,including handling issues. It is not a win-win situation so do your research and make the choice that suits you best. |
If you like the 19's and runflats, couldn't you just get 19's and put runflats on them? I don't think your ride quality will suffer much more with this setup than it would with 18's and runflats.
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Originally Posted by den535d' post='406049' date='Mar 23 2007, 01:16 PM
That's a major problem that seems to continue. I had an E90 Sport loan car the other day with RFTs and it was terrible. Rock hard ride with lots of higher frequency vibrations coming off the road. Loads of road noise and tramlining worse than I remember. I am glad I don't RFTs any more!
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Originally Posted by mick550' post='406012' date='Mar 23 2007, 04:13 PM
Wow, that video really shows the safety advantages of the RFT.
If there are only minute differences in ride quality between the 18 RFT & 19 nonRFT setup, then I would probably choose RFT for the safety factor. Does anyone know if they make an 18" version of m172 wheels? |
Originally Posted by 1994_RX-7_Tour' post='406084' date='Mar 23 2007, 06:28 PM
What exactly is "tramlinging"? Never heard that term before. Thanks.
The car seems to 'wander' a little. |
Yes, RFT are alot safer. However, they are more expensive to replace and very hard to patch. I suggest to anyone who has RFT's to buy sometype of insurance policy that covers all types of damage to both the rim and the tires.
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Originally Posted by bmw1986' post='406105' date='Mar 23 2007, 07:37 PM
I suggest to anyone who has RFT's to buy sometype of insurance policy that covers all types of damage to both the rim and the tires.
As for more expensive. In UK, RFTs are only about 15% more expensive. ABC |
Originally Posted by aybeesea' post='406112' date='Mar 23 2007, 07:51 PM
What makes the rims more susceptible to damage?
ABC Non RFT's flex more so absorb the impacts and disperse the energy. |
Originally Posted by KAF' post='406119' date='Mar 23 2007, 08:13 PM
Firmer sidewalls transmit more force into the rims.
The sorts of forces you may be talking about would result in rim damage irrespective of tyre type (the tyre would disintegrate) and such magnitude of force is not routine, thankfully. ABC |
Originally Posted by KAF' post='406096' date='Mar 23 2007, 09:16 PM
It's when the car seems to follow imperfections in the road surface, white lines, depressed areas where truck wheels have been, etc.
The car seems to 'wander' a little. "Wander a little" is a huge understatement! When the RF tyres "follow imperfections and depressed areas in the road surface" so badly, that the car cannot be saftly driven on Finnish roads, it is much more than a small defect. Did post this tread to BMW Suomi, at this date and hour. |
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