What is ideal tire pressure for run flats
01-16-2005, 04:46 PM
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My Ride: MY 2004 545i; April build; 6 speed; silver grey metalic; black leather; poplar; sport package; cold weather; active steering; xenons .
Has anybody experimented with different tire pressures for the OEM run flats to try to find an ideal pressure that balances handling, ride and noise?
01-17-2005, 01:03 PM
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My Ride: MY 2004 545i; April build; 6 speed; silver grey metalic; black leather; poplar; sport package; cold weather; active steering; xenons .
Hasn't anyone been playing with tire pressure on the run flats?
01-17-2005, 01:17 PM
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My Ride: E60 530d Sport - Carbon Black, Black Dakota Leather, Media Pack (satnav, bluetooth, CD changer), heated font seats, through load
I'm thinking about playing with them.
Not happy with the grip of the rear tyres. Might just be the torque of the diesel engine, but the back end steps out at odd occasions.
Probably will try loweringt he pressures slightly first. But not for a month or so just yet.
Not happy with the grip of the rear tyres. Might just be the torque of the diesel engine, but the back end steps out at odd occasions.
Probably will try loweringt he pressures slightly first. But not for a month or so just yet.
01-17-2005, 01:17 PM
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My Ride: E60 530d Sport - Carbon Black, Black Dakota Leather, Media Pack (satnav, bluetooth, CD changer), heated font seats, through load
BTW I currently have the factory issued GY NCT 5 tyres (245/40/18)
01-17-2005, 01:19 PM
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Originally Posted by dfndr' date='Jan 16 2005, 07:46 PM
Has anybody experimented with different tire pressures for the OEM run flats to try to find an ideal pressure that balances handling, ride and noise?
[snapback]79890[/snapback]
Zero psi. This would be unmounted and stacked in a pile on the floor (hopefully of someone else's garage). You would then have some high quality tires on your car.
Sorry, couldn't resist.
01-17-2005, 01:20 PM
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My Ride: MY 2004 545i; April build; 6 speed; silver grey metalic; black leather; poplar; sport package; cold weather; active steering; xenons .
Originally Posted by BangleBox_530d' date='Jan 17 2005, 06:17 PM
I'm thinking about playing with them.
Not happy with the grip of the rear tyres. Might just be the torque of the diesel engine, but the back end steps out at odd occasions.
Probably will try loweringt he pressures slightly first. But not for a month or so just yet.
Not happy with the grip of the rear tyres. Might just be the torque of the diesel engine, but the back end steps out at odd occasions.
Probably will try loweringt he pressures slightly first. But not for a month or so just yet.
[snapback]80155[/snapback]
01-17-2005, 04:29 PM
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I ran 38 psi all around but the tires were harsh even at 32. They get noisy because the large tread blocks wear at a slight angle. This is sometimes called feathering or cupping. Rotation of the tires left-to-right evens out this wear and reduces the noise. BMW does not condone rotation for some vague reason.
01-17-2005, 04:32 PM
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My Ride: MY 2004 545i; April build; 6 speed; silver grey metalic; black leather; poplar; sport package; cold weather; active steering; xenons .
Originally Posted by jefferysf' date='Jan 17 2005, 09:29 PM
I ran 38 psi all around but the tires were harsh even at 32. They get noisy because the large tread blocks wear at a slight angle. This is sometimes called feathering or cupping. Rotation of the tires left-to-right evens out this wear and reduces the noise. BMW does not condone rotation for some vague reason.
[snapback]80212[/snapback]
01-17-2005, 04:51 PM
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Still works. FTM is not specifically for just run flats. Incidentally, I run the door post pressures and have gotten along pretty good with my run flats. They might even have been life savers.