Third Gen Runflat Tires Tested on E92 by Tire Rack: Finally Without Tradeoffs

Mr. ///M3 RD · 12-03-2011, 02:56 PM

Quote:

Originally Posted by lawgone

I've had my e92 about 8 months now. The last few months I've noticed a vibration that feels as though it's coming from the passenger front wheel. Its almost as if there is a hard spot on the wheel. The faster you go the more you feel it. It's worse when it's cold but I've also experienced it on some warm days. Am I likely experiencing the normal behavior of RFT's or could this be an unbalanced tire or a cracked rim? I'm going to call my dealer but wanted some opinions here first. Thanks in advance.

Might be a tire problem (cracked rims in my case happened on the very light alloy wheel oem style 296, not only to my wheels also to others). Have a tire shop or the dealer check your wheel and tire.

Glim · 12-03-2011, 08:34 PM

Quote:

Originally Posted by cvc 22349a

Quote:

Originally Posted by pcockley

Sorta OT but has anyone actually used slime? I have seen the stuff and all sounds good but just wanted to hear from someone who has actually used it and your thoughts

Slime would clog up your TPMS and makes a mess of the wheel

Our E9x cars do not have TPMS and slime just washes off the rim/tire. You can pick up a kit that comes with a small compressor which fits in the under trunk storage spot.

Bimmerlover76 · 12-05-2011, 03:16 AM

I'm not sure if people don't buy RFT because of the ride quality. Sure it's stiffer, but damn, they are a lot more expensive that what they are worth. The cost is directly proportional to amount of fear the buyer has of getting stranded.

eisenb11 · 12-05-2011, 10:54 AM

Quote:

Originally Posted by Glim

Our E9x cars do not have TPMS and slime just washes off the rim/tire. You can pick up a kit that comes with a small compressor which fits in the under trunk storage spot.

All modern cars are required to have TPMS.

cc_25 · 12-05-2011, 12:57 PM

Quote:

Originally Posted by Glim

Our E9x cars do not have TPMS

They do in the US.

Quote:

Originally Posted by eisenb11

All modern cars are required to have TPMS.

Canadian e9x models don't have "regular" TPMS, they use the ABS sensors to measure rotation speed thereby extracting pressure (change in speed=change in size=change in pressure)

Though I'm not sure how that works with a run-flat.

Glim · 12-05-2011, 11:43 PM

Quote:

Originally Posted by cc_25

They do in the US.

Canadian e9x models don't have "regular" TPMS, they use the ABS sensors to measure rotation speed thereby extracting pressure (change in speed=change in size=change in pressure)

Though I'm not sure how that works with a run-flat.

Guys, there are NO TPMS sensors in E9x cars wheels or rims

Please read the owners manual, page 65

There are no 'in tire' sensors to clog or fail with slime or any other product.

Excerpt from owners manual:

Flat Tire Monitor FTM*

The concept

The Flat Tire Monitor monitors tire pressures while the car is being driven. The system reports any significant loss of pressure in one tire in relation to another. If a tire loses pressure, its rolling radius changes, and this in turn alters the speed of rotation. This change is detected and is reported as a flat tire.

asus389 · 12-06-2011, 12:33 AM

IIRC the 2006 models used the "relative to each other based on rotation/ABS" system, but later models actually did have sensors in the wheel that measured the PSI directly.

Has anyone driven a few thousand miles on these new RFTs yet? Can you comment on the wear and noise levels?

Gary@TireRack · 12-06-2011, 10:26 AM

Cars purchased from Canada with rubber valve stems do not have TPMS sensors.

Those with OE metal valve stems (yes, even when purchased from Canada) do have TPMS sensors.

Alliedacid · 10-02-2012, 02:33 PM

ok so all the BS on the side.

1 has anyone bought them?
2 how many miles driven?
3 how is the wear?
4 ride compared to the ultra summer RFT?
5 driving style
6. hwy's or city?

F32Fleet · 10-03-2012, 02:12 PM

Quote:

Originally Posted by Alliedacid

ok so all the BS on the side.

1 has anyone bought them?
2 how many miles driven?
3 how is the wear?
4 ride compared to the ultra summer RFT?
5 driving style
6. hwy's or city?

I have them. They ride like 18"s on non-rft. Its an AS tire so keep.that in mind.

12-05-2011, 03:16 AM	#25
Bimmerlover76 Lieutenant 25 Rep 598 Posts Drives: 2009 335i Coupe Join Date: Oct 2011 Location: Kalamazoo, MI iTrader: (0)	I'm not sure if people don't buy RFT because of the ride quality. Sure it's stiffer, but damn, they are a lot more expensive that what they are worth. The cost is directly proportional to amount of fear the buyer has of getting stranded.
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12-06-2011, 12:33 AM	#29
asus389 Captain 68 Rep 639 Posts Drives: 11 E90 328i Join Date: Jun 2009 Location: Michigan iTrader: (0) Garage List 2011 BMW 328i [0.00]	IIRC the 2006 models used the "relative to each other based on rotation/ABS" system, but later models actually did have sensors in the wheel that measured the PSI directly. Has anyone driven a few thousand miles on these new RFTs yet? Can you comment on the wear and noise levels?
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12-06-2011, 10:26 AM	#30
Gary@TireRack Moderator 369 Rep 4,745 Posts Drives: Formerly 1995 M3 Join Date: Oct 2006 Location: South Bend, IN, Tire Rack HQ iTrader: (2)	Cars purchased from Canada with rubber valve stems do not have TPMS sensors. Those with OE metal valve stems (yes, even when purchased from Canada) do have TPMS sensors. __________________ Gary. Tire and Wheel Forum Moderator. Tire Rack Sales Rep Gary@Tirerack.com http://www.tirerack.com/a.jsp?a=AH8&url=index.jsp Please refer to 'Gary/E90 Post' as your previous contact when you order online to help support this forum.
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10-02-2012, 02:33 PM	#31
Alliedacid Enlisted Member 0 Rep 35 Posts Drives: '06 325i ZHP / '13 X5d ZHP Join Date: Jul 2011 Location: NJ iTrader: (0) Garage List 2013 BMX X5 xDrive35d [0.00]	ok so all the BS on the side. 1 has anyone bought them? 2 how many miles driven? 3 how is the wear? 4 ride compared to the ultra summer RFT? 5 driving style 6. hwy's or city?
	Appreciate 0 Quote