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Author Topic: Tires that run even when it's flat  (Read 2370 times)

Offline Brent

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Re:Tires that run even when it's flat
« Reply #15 on: August 05, 2004, 08:27:17 PM »
I've seen 2 types of run flat tires:

The first simply has stiffened sidewalls that allow you to run at limited speed and distance to the nearest tire repair shop.  I think they used these as stock tires for a previous generation Corvette.  

The second uses special rims with solid but pliable rubber (or was it plastic?) wheels mounted on it.  The normal tire is mounted over this assembly such that in case of a puncture, the inner wheel takes on the weight.  

In both cases, the extra material adds weight and reduces performance.  So I kind doubt if those proprietary Bridgestone Potenza Scuderias the Enzo uses are run-flat tires :).

Its the first one you mentioned.

Well if you don't believe me, then you're welcome to go to the Bridgestone Tire Center at the Fort and ask them yourself. They (Steven and Philip) were the ones who told me that.

Quote
Some BMWs come with run-flat tires.

The 330i Security I believe does have this fitted on it.

Quote
And, they don't have a machine that can mount/dismount runflat tires yet since the regular tire mounting machines cannot handle runflats due to their ultra-stiff and hard sidewalls. Uh oh....

I believe Bridgestone Tire Center can mount them since they're selling the tires there as replacement tires for the E60 5 Series if I'm not mistaken. At least thats the application I saw them promoting there.

Offline stradale

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Re:Tires that run even when it's flat
« Reply #16 on: August 05, 2004, 10:10:09 PM »
Sorry, I didn't mean to offend.  It just didn't make sense to put heavy run flat tires (and thereby more unsprung weight) on a car meant to be the ultimate production track car.  Also, how would the weighty sidewalls cope with the immense centrifugal forces while the Enzo is doing 355-kph?

AFAIK, the main target market for these run flat tires are the escorted VIP types who would want a quick getaway even with shot tires.  But I can see the sense with using run flats in sports cars which is to eliminate the need of a spare tire, thereby saving weight and space.    

Anyway, here's an article on the tires in question:

http://www.bridgestone-firestone.com/news/newsarchive_2002.asp?id=2002/020723a

Browsing further, I read that Bridgestone supplies Potenza RE050 Scuderias for the Enzo and Potenza RE050 RFT for the new Scaglietti.  There it is.  The RFT's, not the Scuderias, are run flats :).
« Last Edit: August 05, 2004, 10:38:56 PM by stradale »

Offline stradale

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Re:Tires that run even when it's flat
« Reply #17 on: August 05, 2004, 10:41:34 PM »
Can't get the above link to work directly.  Anyway, just click on News, scroll to the bottom, click on 2002 Archives, and find the July 23, 2002 article. :)
« Last Edit: August 05, 2004, 10:44:29 PM by stradale »

Offline joms

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Re:Tires that run even when it's flat
« Reply #18 on: August 08, 2004, 12:14:15 AM »
Went to Bridgestone Fort today and saw the run flat tires which are only available for the BMW 5 Series. Costs P9000+ each.


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