SWITCHING FROM RUN-FLATS TO MCIHELLIN PS2s
02-16-2006, 08:57 AM
#11
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Hmm I dont think tires play big role in this case of turning over the bumps. It's suspension's job to make sure to keep the rubber down and in case of going over the bumps while turning it doesnt matter if it's stiffer or softer it's Rebound that takes care of it and each factory or aftermarket shock has different settings. This whole thing about RF tires
being complitely trash is untrue and if you like you'r car stiff keep em on while with softer tire car will float from side to side, I've had that experience with my other car and it felt weird and took some time to get used to.
Cheers, BMWN
being complitely trash is untrue and if you like you'r car stiff keep em on while with softer tire car will float from side to side, I've had that experience with my other car and it felt weird and took some time to get used to.
Cheers, BMWN
02-16-2006, 09:42 AM
#12
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My Ride: '04 545iS 6 spd, bought new via eBay, 11/05; Blk/Gry, Cold, L7, PDC, BMW Rear seatcover for pets.
First "Bumwa" was a new 1971 2002. High performance 5s since 1987. Beamer motorcycles too, currently on an 07 BMW K1200 GT; also a Moto Guzzi 1000 SP III.
I had the Pilot A/S on my E39 540 6spd and they lasted forever (till I traded), but they were no where near as tight and grippy as the Dunlop SP2000 that were OEM--which only lasted about 20K. That would make their design at least 6-7 years old now. Otherwise, I have noticed that the new PS2 comes on all kinds of luxury hot rods (Bentley etc). so I think I'd go with them, vs the A/S.
Cheers,
Ray Hull
Cheers,
Ray Hull
02-16-2006, 10:34 AM
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My Ride: E61 530d Touring, May 2004
Tyres do make a big difference to suspension response, tramlining etc
Refer to Colin Chapman / Lotus et al about suspension and tyre compliance
Refer to Colin Chapman / Lotus et al about suspension and tyre compliance
02-16-2006, 11:54 AM
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My Ride: 2007 BMW 550, Sport, Navi, PS, CWP, Sirius
Originally Posted by katheikia' post='241192' date='Feb 16 2006, 11:19 AM
Well from previous searches and disussions others have stated the following differences: Much improved ride quality, (the run-flats are like metal boots), less road noise and somewhat better tread life. My biggest concern is ride quality, the run-flats feel unstable to me, when taking a turn and going over a bump your car should not side skip over the bump!!! My previous E39 540 sport did not do this and it had a stiffer suspension than my current E60 550.
02-16-2006, 12:19 PM
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Originally Posted by vern' post='241146' date='Feb 16 2006, 02:20 PM
When you say so much better thats a broad statement what do you mean? Handling,ride quality, proformance,wear or what? I'll be looking to make the change too but I'd like more information.TIA
02-16-2006, 12:21 PM
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Originally Posted by BMWN' post='241234' date='Feb 16 2006, 05:57 PM
Hmm I dont think tires play big role in this case of turning over the bumps. It's suspension's job to make sure to keep the rubber down and in case of going over the bumps while turning it doesnt matter if it's stiffer or softer it's Rebound that takes care of it and each factory or aftermarket shock has different settings. This whole thing about RF tires
being complitely trash is untrue and if you like you'r car stiff keep em on while with softer tire car will float from side to side, I've had that experience with my other car and it felt weird and took some time to get used to.
Cheers, BMWN
being complitely trash is untrue and if you like you'r car stiff keep em on while with softer tire car will float from side to side, I've had that experience with my other car and it felt weird and took some time to get used to.
Cheers, BMWN
02-16-2006, 01:41 PM
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My Ride: F11 535i M-Sport,, Silver, Black Leather, LED Adaptive headlights
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Changing to non RFT's made a huge difference to my 530D, harshness of ride is gone, tramlining is non existant and the skipping sideways sensation whn clipping bumps on bends has gone. All were problems with OEM RE050's.
It is nuts to suggest that it is suspension not tyres that keep you on line on bends, it is only the tyres that are in contact with the road, if they are poor the suspension can be the best in the world and it will still not cope.
Otherwise we would all be putting remoulds on our cars and saving a fortune !
It is nuts to suggest that it is suspension not tyres that keep you on line on bends, it is only the tyres that are in contact with the road, if they are poor the suspension can be the best in the world and it will still not cope.
Otherwise we would all be putting remoulds on our cars and saving a fortune !
02-16-2006, 02:08 PM
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My Ride: 2001 BMW330ci, Steel Gray, Black leather, Steptronic, PP, SP, PDC, Heated seats, Xenon head lights, HK, 6 disk changer, OEM alarm, OEM clears,Iice white fog lights ,Universal trasnciver, 17 inch Michelin Pilot Sport Tires
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Originally Posted by BMWN' post='241234' date='Feb 16 2006, 12:57 PM
Hmm I dont think tires play big role in this case of turning over the bumps. It's suspension's job to make sure to keep the rubber down and in case of going over the bumps while turning it doesnt matter if it's stiffer or softer it's Rebound that takes care of it and each factory or aftermarket shock has different settings. This whole thing about RF tires
being complitely trash is untrue and if you like you'r car stiff keep em on while with softer tire car will float from side to side, I've had that experience with my other car and it felt weird and took some time to get used to.
Cheers, BMWN
being complitely trash is untrue and if you like you'r car stiff keep em on while with softer tire car will float from side to side, I've had that experience with my other car and it felt weird and took some time to get used to.
Cheers, BMWN
cheers
vern
02-16-2006, 02:18 PM
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My Ride: F11 535i M-Sport,, Silver, Black Leather, LED Adaptive headlights
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Vern, sorry you are not correct. it is a myth that the car was designed around RFT's.
It has been debunked here several times
It has been debunked here several times
02-16-2006, 04:17 PM
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Originally Posted by SergeyM' post='241326' date='Feb 16 2006, 12:54 PM
I agree with your observation about E39 540. I do not think that RFTs are the culprit here though. E39 generally was much more stable that E60 and controllable than E60. E60 has tons of electronics that supposed to make it sportier but is not a sports car in its nature. It is more like smaller 7-series than bigger M3.