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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 > This should end the Run-flat debate!



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      11-26-2005, 10:16 AM   #1
espo
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This should end the Run-flat debate!

Thought you may find this interesting, It's a new "tire" being developed that will never go flat, because it has no AIR!!!

http://www.time.com/time/business/ar...129516,00.html
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      11-26-2005, 10:43 AM   #2
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Looks like it might Run-flat on one side
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      11-26-2005, 10:43 AM   #3
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very cool technology, can't wait for it to eventually roll out into production

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      11-28-2005, 12:47 AM   #4
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Originally Posted by MarkE90M3
very cool technology, can't wait for it to eventually roll out into production

and it's ridiculously ugly. No way that I put these on my 330.
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      11-28-2005, 12:54 AM   #5
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Quote:
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and it's ridiculously ugly. No way that I put these on my 330.
Yeah, but can you imagine how much weight is saved per corner!
That thing can't be more than 10-15 lbs! :rocks:
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      11-28-2005, 12:59 AM   #6
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who cares about the weight. I can't even use all my 255 hp.
If they want to save weight, they should start developing good rubber or plastic materials for the car instead of metals now...hehe
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      11-28-2005, 02:00 AM   #7
visor
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Ahhh, but losing unsprung weight does wonders for the acceleration and handling...
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      11-28-2005, 03:16 AM   #8
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Those rubber bands should decrease cornering performance due to the lack of sidewall flex. One could imagine the ride on one of those tires. How do they attach the tire on the wheel since there is no bead to seat?
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      11-28-2005, 08:05 AM   #9
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looks like an oversize Brillo Pad, Cant wait to hear what Armour-All has to say about this.

That will be an awesome, eggbeater during a snow storm. That tire will never fly, not in your lifetime.
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      11-29-2005, 09:22 PM   #10
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Quote:
Originally Posted by Pretender
and it's ridiculously ugly. No way that I put these on my 330.


its sidewalls are cut off to see the technology

but after reviewing the link im not positive. i think it would be asthetically pleasing to put some side walls on there!
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      11-30-2005, 01:04 AM   #11
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If you follow it to the michelin site it has even more info. It sounds like with the "rubberbands" going across the tire they can design for the lateral loads and the vertical loads seperately and make the car incredibly stiff laterally yet soft vertically. Seems to me these wheels have tremendous potential. Getting people to accept them, much like RFT now, could be a challenge though. (looks around at all the RFT haters )
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      11-30-2005, 09:02 AM   #12
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there we go RFT fans, you want it ! you got it ! Lets see that in 18" or 19" staggered setup on you BBS or most admired wheels pls, cruising down Maint St. on a warm Summer Saturday night.

I wonder how the hot babes reacts to it, even with your Ferraris, Porsches, Aston Martins, Jags, Benz, Bmrs, Maybachs, they'll go "hmmm", huh?, .
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      11-30-2005, 10:50 AM   #13
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seems to me like it'd flex like those underinflated drag race tires where the sidewall wrinkles as you take off

I don't mind the look though
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      11-30-2005, 11:55 AM   #14
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I'd guess the technology works better on lower profile tires since the distance between the wheel and tire is smaller thereby offering less flex.
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      11-30-2005, 02:33 PM   #15
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It was in Popular Mechanics recently...it's a one piece wheel, which is why there's no bead I guess.
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      11-30-2005, 02:37 PM   #16
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They have been working on this for a while.


The idea is that they can vary the thickness of the "ribs" to control the stiffness of the ride. The down side to this is it lacks what current tires have in terms of sidewall flex.
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      11-30-2005, 02:42 PM   #17
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they make inserts sort of like this for dirt bike tires many pro motocross racers use them. I think they are a few hundred each and no flats
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      11-30-2005, 03:30 PM   #18
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Quote:
Originally Posted by MarkE90M3
very cool technology, can't wait for it to eventually roll out into production

article says quote

"The Tweel has been tested on the IBOT robotic wheelchair and military vehicles. But you won’t see it on your Honda anytime soon. Michelin says it is still too noisy for automotive applications."

just as when we thought it would be the end to all this RFT debacle.

... but no flats, hmmm
... just cover up the side walls and take some of the noise out, and give me four pls!
No! No! just four main tires, no spares pls.
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