SWITCHING FROM RUN-FLATS TO MCIHELLIN PS2s
#21
Guys,
I'm not saying that RF are better than PS2 since I havent tried them yet.
My car has 1600 miles as of today so tires are pretty much new. It's just the fact that some people switch them right away its just $$ you're throwing out, I should have mentioned before that ride RF untill they are gone then make your choice. Now about suspension and tires I agree that tires play role witht he whole performance thing but generaly it's the grip that they are providing and how fast they warm up. With that being said ride could be harsher with certain type of tires like in our case its RF due to stiffer side walls which is obvious, but its not terrible ride like some1 stated earlier in other posts. I think BMW put them on for reason but who knows, hearing only positive things about PS makes me want to buy them but not untill my RF are gone. Enjoy the ride folks,
my assumptions came from ridding motorcycles and I've done tons of mods to my Suzuki SV650S that has only original frame and engine on it.
I'm not saying that RF are better than PS2 since I havent tried them yet.
My car has 1600 miles as of today so tires are pretty much new. It's just the fact that some people switch them right away its just $$ you're throwing out, I should have mentioned before that ride RF untill they are gone then make your choice. Now about suspension and tires I agree that tires play role witht he whole performance thing but generaly it's the grip that they are providing and how fast they warm up. With that being said ride could be harsher with certain type of tires like in our case its RF due to stiffer side walls which is obvious, but its not terrible ride like some1 stated earlier in other posts. I think BMW put them on for reason but who knows, hearing only positive things about PS makes me want to buy them but not untill my RF are gone. Enjoy the ride folks,
my assumptions came from ridding motorcycles and I've done tons of mods to my Suzuki SV650S that has only original frame and engine on it.
#22
Originally Posted by Keith Farrow' post='241423' date='Feb 16 2006, 10:41 PM
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.
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.
The 3-series seems to have been better 'tuned' for them but this may have more to do with the choice of tyre - The Eurofia's are not available on the 5-series...
I'm sure things will improve but I doubt they can ever iron out all the 'issues' of Runflats...
#23
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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
2005 530i Titanium Gray,Black leather, Nav.,HUD,PP,CWP,SP,PDC,Xenon lights,Steptronic,Logic 7 sound system,,Fold down read seats,Power shades
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Originally Posted by Keith Farrow' post='241447' date='Feb 16 2006, 06:18 PM
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
cheers
vern
#24
PS2's are great tires for handling and ride, and wear. Problem is durability. I have gone through 3. One shredded mysteriously on the highway. One ripped out the sidewall after a light bump on the curb (wife driving), and one was a nail so I will let that one pass.
Note Michelin used to promote this as their "Formula 1 tire for passenger cars". After the US Grand Prix fiasco last year they no longer do this. I was at the USGP so I have a personal issue with this as well, but in my mind I wonder if the first two cases were due to "driver error" or Michelin error.
Great tire, but for close to $300 installed for the rears it is tough to justify the durability.
Note Michelin used to promote this as their "Formula 1 tire for passenger cars". After the US Grand Prix fiasco last year they no longer do this. I was at the USGP so I have a personal issue with this as well, but in my mind I wonder if the first two cases were due to "driver error" or Michelin error.
Great tire, but for close to $300 installed for the rears it is tough to justify the durability.
#25
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
When going over bumps, if you have a stiff sidewall, you get more compression of the springs and shocks because the sidewall is compressing less. One of the problems with the runflats is their sidewall is so stiff that a lot of the deflection is transferred to the suspension and the driver will feel a harsher ride.
On the other hand, the stiffer sidewall will give sharper turn-in response because the sidewall will not deflect sideways as much when turning the wheel. A softer sidewall tire can give you that 'floating' feeling compared to the runflats - I experienced the same thing with my Michelin A/S tires. However, if you get really top-notch maximum performance tires, such as the Goodyear F1 GS-D3's, or Michelin PS2's, they will give you fantastic turn-in without sacrificing the ride quality.
#26
Originally Posted by wolverine' post='241737' date='Feb 17 2006, 01:41 PM
However, if you get really top-notch maximum performance tires, such as the Goodyear F1 GS-D3's, or Michelin PS2's, they will give you fantastic turn-in without sacrificing the ride quality.
#27
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From: Kingdom Of Saudi Arabia
My Ride: E60 545i, 2004. Alpine white, ventilated seats, confort seats, bluetooth, HI-FI Audio, Electrical Rear Blinds, manual Side blinds, Sport Package, Confort Glass,Active steering, Business Navigation
I Drive my car in Saudi Arabia in a hot climate all year long. my Dunlop Run Flat tires makes my ride really stiff.
I red lots of posts about the difference in comfort between the RFT and normal tires but did not really consider that untill couple of weeks back when i took a loan car from the dealer a 520 with non-RRFT. I was amazed with the comfort difference between the 520 and the my 545.
i made a research among the long tire dealers (Micheling/Pirelli and Bridgestone) in order to swicth to normal tire, but the think that is making me think twice is that i dont have a spare tire nor tools, but still i strongly beleive thata shift to traditional tires is a must since most of the rattles coming from the hardness of the ride.
regards
I red lots of posts about the difference in comfort between the RFT and normal tires but did not really consider that untill couple of weeks back when i took a loan car from the dealer a 520 with non-RRFT. I was amazed with the comfort difference between the 520 and the my 545.
i made a research among the long tire dealers (Micheling/Pirelli and Bridgestone) in order to swicth to normal tire, but the think that is making me think twice is that i dont have a spare tire nor tools, but still i strongly beleive thata shift to traditional tires is a must since most of the rattles coming from the hardness of the ride.
regards
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