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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wheels and Tires Forum Sponsored by The Tire Rack > Run flat tires with non run flat rims: is it possible?



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      11-19-2005, 03:17 PM   #1
enricob
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Run flat tires with non run flat rims: is it possible?

I've found a very beatiful replica rims but they are non run flat. The seller said me is it possible? what do you think?

Greetings from Italy to all E90/E91 owners
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      11-19-2005, 04:36 PM   #2
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There is no such thing as "run flat rims." All rims can accept either runflats or traditional tires as long as they are the correct size.
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      11-20-2005, 01:30 AM   #3
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Hi and welcome!

A run-flat rim may be one that contains a pressure monitor (TPMS) fixed inside the wheel, however BMW does not adopt that approach, opting instead for a DSC based system that compares rotation speed of individual wheels to generate a deflation warning for the tire whose speed is out of sync. (Flat tire has different rotational speed.) So for BMWs there are no specific run-flat rims.

I vaguely recall reading that all rim lips are not the same (no ... don't even go there... heh!) wrt to mounting run-flats. If in doubt, maybe talk to the shop where you'll have them mounted to see what they say.
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      11-28-2005, 02:45 PM   #4
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run flat rims

I just mounted a non-run flat winter tires on my run flat rims. and there is a difference. there are 2 some kind of a lip on both sides compare to smooth surface from the edge of the rim.

Attached is a picture of my run flat rim.
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      11-30-2005, 07:51 PM   #5
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Quote:
Originally Posted by MonacoBlueNJ
There is no such thing as "run flat rims." All rims can accept either runflats or traditional tires as long as they are the correct size.
you are correct! because E90 RFT sensor are incorporated with the brake ABS. It is not on the tire valve nor wheel, this as explained to me by my dealer BMW mechanic. I dont know about overseas, thats not my worry.
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      12-01-2005, 10:47 AM   #6
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run flat rims

I did talk to my tire dealer and he told me that. He showed me the difference between the conventional rim and the run flat rims and that lip is the difference. Anyways I mounted my conventional winter tires on this run flat rims and it runs great even better than the Bridgestone run flat tire.
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      12-01-2005, 11:29 AM   #7
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Quote:
Originally Posted by rexbmw
I did talk to my tire dealer and he told me that. He showed me the difference between the conventional rim and the run flat rims and that lip is the difference. Anyways I mounted my conventional winter tires on this run flat rims and it runs great even better than the Bridgestone run flat tire.
it runs great because the run flat weigh a ton.
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      12-01-2005, 11:45 AM   #8
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I have also noted that the only Run Flat Rim currently, that I know of in the market, are the Michelins RFT PAX rims. These rims are available for Hondas, as with my discussion with TireRack just now, over the phone as i wanted better clarifications. FYI to better get sense of whats out there.

http://www.familycar.com/CarCare/RunFlatTires.htm
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