MINI2

mrmikimaus · Jul 16th, 2006, 08:44 PM

considering that run flats cost substantially more, i was initially hesitant about swapping out my rims and re-using the stock runflats, i still am after. my thoughts and observations.

1) stock rims weigh in at more than 10kg each, forged, 6.9kg.

2) original rims have a different rolled profile to prevent bead slippage.

3) tire pressure monitoring system is in e hub, not the rim.

4) runflats not designed to work on regular rims. once deflated, it's substantially easier for bead to slip off during hard cornering.

5) the weight of the runflats is not that much heavier. it's is, but not substantial.

i'm posting cuz had i known (4), i would have re-considered.

MINIAC · Jul 16th, 2006, 08:53 PM

Quote: Originally Posted by mrmikimaus

4) runflats not designed to work on regular rims. once deflated, it's substantially easier for bead to slip off during hard cornering.

Why would you be driving aggressively on a deflated tire

Root Ginger · Jul 16th, 2006, 09:37 PM

It can be very easy to do as the runflat indicator is quite frankly poor. It is possible to drive for significant time before it realises the tyre is deflated. Seems to work well on straight continuous speed roads but for round town you can drive a long way without it warning you, even when there is 0psi in the tyres.

Paul · Jul 16th, 2006, 09:37 PM

There is no tyre pressure monitoring system so to speak, it's an adaptation/advancement of the ABS sensor, it detects the speed the wheels are turning, and bases the "flat" warning if one is spinning faster than the others.

Paul · Jul 16th, 2006, 09:37 PM

And on the above, I detected a flat on an S before the sensor did!

minigolf · Jul 16th, 2006, 10:40 PM

I'm surprised you found someone willing/able to fit a runflat tyre on a rim not designed for such tyres.

nylo · Nov 15th, 2006, 08:54 PM

So is fitting RFs to non runflat wheels a big no-no then?

humph · Nov 15th, 2006, 09:33 PM

That appears to depend on the brand of runflat. The dunlop website for runflats clearly states that their tyres can be mounted on any rim. See the DSST section of the link below.

Dunlop Tyres UK

I asked the same question of pirelli with a view to using the runflats off my new Cooper on aftermarket alloys. Pirelli sent me the following reply via email.

"Thank you for your enquiry.
These tyres are recommended to be fitted to EH2 (Double extended Hump)
rims but, are permissible to be fitted to H2(Double Hump) rims."

This may help clear up a few things. I have to admit Pirelli's response didn't fill me with confidence.

nylo · Nov 15th, 2006, 09:44 PM

Interesting. As you say, the Dunlop site states "DSST-tyres can be mounted on any standard rim", so that would be a thumbs up form them.

What exactly does that email from Pirelli mean?

Have seen some rims on Ebay and was wondering about keeping RF tyres...

AlexF2003 · Nov 17th, 2006, 10:36 AM

It means you can fit run-flat tyres to any rim

Alex

Jul 16th, 2006, 08:44 PM	#1
mrmikimaus HisHaiNess - MINIster Join Date: Dec 2005 Local Time: 10:13 PM Posts: 9 Offline	run flats on regular rims. my observation. considering that run flats cost substantially more, i was initially hesitant about swapping out my rims and re-using the stock runflats, i still am after. my thoughts and observations. 1) stock rims weigh in at more than 10kg each, forged, 6.9kg. 2) original rims have a different rolled profile to prevent bead slippage. 3) tire pressure monitoring system is in e hub, not the rim. 4) runflats not designed to work on regular rims. once deflated, it's substantially easier for bead to slip off during hard cornering. 5) the weight of the runflats is not that much heavier. it's is, but not substantial. i'm posting cuz had i known (4), i would have re-considered. The more you know, the less you know you know...

Jul 16th, 2006, 09:37 PM	#3 (permalink)
Root Ginger Amiga 500 to PS3 20 Years Join Date: Jul 2001 Location: Slough, Berkshire Local Time: 03:13 PM Posts: 4,571 Offline	It can be very easy to do as the runflat indicator is quite frankly poor. It is possible to drive for significant time before it realises the tyre is deflated. Seems to work well on straight continuous speed roads but for round town you can drive a long way without it warning you, even when there is 0psi in the tyres. It was acceptable in the 80's

Jul 16th, 2006, 09:37 PM	#4 (permalink)
Paul Trained Monkey My Classifieds Join Date: Jan 2001 Location: Bedfordshire Local Time: 03:13 PM Posts: 38,811 Online	There is no tyre pressure monitoring system so to speak, it's an adaptation/advancement of the ABS sensor, it detects the speed the wheels are turning, and bases the "flat" warning if one is spinning faster than the others. There aint no party like my nana's tea party

Jul 16th, 2006, 09:37 PM	#5 (permalink)
Paul Trained Monkey My Classifieds Join Date: Jan 2001 Location: Bedfordshire Local Time: 03:13 PM Posts: 38,811 Online	And on the above, I detected a flat on an S before the sensor did! There aint no party like my nana's tea party

Jul 16th, 2006, 10:40 PM	#6 (permalink)
minigolf Blue is the colour! Join Date: Jul 2003 Location: Canberra, Australia Local Time: 01:13 AM Posts: 13,078 Offline	I'm surprised you found someone willing/able to fit a runflat tyre on a rim not designed for such tyres. Sabine Schmitz: Fear disturbs your concentration.

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Jul 16th, 2006, 08:53 PM	#2 (permalink)
MINIAC MINI Profiler Join Date: Feb 2001 Location: City By The Bay Local Time: 07:13 AM Posts: 8,324 Online	Quote: Originally Posted by mrmikimaus 4) runflats not designed to work on regular rims. once deflated, it's substantially easier for bead to slip off during hard cornering. Why would you be driving aggressively on a deflated tire

Nov 15th, 2006, 08:54 PM	#7 (permalink)
nylo I will NOT be cured! My Classifieds Join Date: Apr 2004 Location: Bangor, Norn Iron Local Time: 03:13 PM Posts: 18,618 Offline	So is fitting RFs to non runflat wheels a big no-no then? photobucket with lots more pics of runs clicky clicky!

Nov 15th, 2006, 09:33 PM	#8 (permalink)
humph Back To My Old Self Join Date: Jun 2006 Location: In The Wind Local Time: 03:13 PM Posts: 2,631 Offline	That appears to depend on the brand of runflat. The dunlop website for runflats clearly states that their tyres can be mounted on any rim. See the DSST section of the link below. Dunlop Tyres UK I asked the same question of pirelli with a view to using the runflats off my new Cooper on aftermarket alloys. Pirelli sent me the following reply via email. "Thank you for your enquiry. These tyres are recommended to be fitted to EH2 (Double extended Hump) rims but, are permissible to be fitted to H2(Double Hump) rims." This may help clear up a few things. I have to admit Pirelli's response didn't fill me with confidence. MODERN MINI - BEST COOPER NOMINEE - PLEASE VOTE FOR ME!!!

Nov 15th, 2006, 09:44 PM	#9 (permalink)
nylo I will NOT be cured! My Classifieds Join Date: Apr 2004 Location: Bangor, Norn Iron Local Time: 03:13 PM Posts: 18,618 Offline	Interesting. As you say, the Dunlop site states "DSST-tyres can be mounted on any standard rim", so that would be a thumbs up form them. What exactly does that email from Pirelli mean? Have seen some rims on Ebay and was wondering about keeping RF tyres... photobucket with lots more pics of runs clicky clicky!

Nov 17th, 2006, 10:36 AM	#10 (permalink)
AlexF2003 AFRacing My Classifieds Join Date: May 2006 Location: Newbury Local Time: 03:13 PM Posts: 257 Offline	It means you can fit run-flat tyres to any rim Alex Alex F - AFRacing LTD

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