Tire strech

[Mr Revhead]

think about how a tire is made
and desgined to work.
then think about whats happening to the side walls under load if you stretch. them to exsessive amounts.

then theres the tread.....

[Snoozin]

Practice > theory.

Never seen a drifter have any troubles with them, and they run some fairly excessive stretch and one would think some pretty extreme lateral loads on their sidewalls.

Stretched tyres rock, end of story. Dude didn't post for a lecture, he posted so he can get some mean stretch happening...

Anyone know where I can find 165 14" tyres????

[Snoozin]

Some awesome stretch, best I could find at short notice.

[drftnmaz]

its done to reduce sidewall flex to aid handling, and to get more traction.... most people think wider tyre= more contact to the road then think more traction BUT when you think about it its the pressure the tyre is excerting on the road so espally in light cars bigger tyre= less pressure spread across the contact patch and less traction... it comes even more into play in the wet.

but most people just do it for the drifter look auuu

and frost post up those pics or pm them to me... Chur

[Mr Revhead]

fine

i'll shut up then.

please stay away from me on the road.

[ollieboy]

Looking at those photo's that snoozin posted, the look doesn't really appeal to me. Everyone is entitled to their own individual tastes though, so I can't judge.

[barryogen]

stolen from another forum.

"My name is Dennis and I am an administrator with the Corrado Club of Canada and I have question about rim sizes & allowable tire widths. I have seen many people fitting tires that are below the minimum recommended rim width being mounted on wider rims to have a stretched look to them. This is results in a narrow tire on a wide rim and from working in the automotive industry for years I know this is not a safe practice. Most of these people are doing this strictly for looks and are unaware of any dangers involved. I was hoping your association would comment on this and say why this is unsafe or safe for that matter as tire shops do mount these combinations. I would be interested to hear how this changes the handling of the tire and what safety concerns a person with this set-up may have such as excessive heat build up or de-rimming tires. I believe this to be a safety concern but it is hard to find any information about this. I have tried many tire manufactures with this same concern and none of them wish to comment. I am concerned because many people do not know there is any issues with this combination and do so simply because they have seen others do it. Any help would be greatly appreciated.
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Here's the respose from the Rubber Association of Canada...


quote:
--------------------------------------------------------------------------------
Hello Dennis,

Your concern regarding motorists who stretch tires onto wider than
acceptable rims is certainly justified. The tire industry and wheel
manufacturers do have a joint organization called the Tire and Rim
Association, based in Akron Ohio which does set standards for acceptable
tire/wheel combinations. And though it would surprise me if reputable tire
retailers would knowingly put a smaller tire on a wider than acceptable rim,
I suspect it does happen.

The obvious danger is that the bead will not/cannot "seat" properly, thereby
potentially destroying the tire bead and causing tire failure, either during
installation or aggressive driving. In either case, the damage could result
in serious or even fatal consequences.

You may want to consult with TRA for more specific information.
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[79rolla]

i have seen some tyers that are only a size or two too small that are streched and look good aswell as getting rid of movement in the walls for better handling ect... bit the ones in thoes pics look ugly and wrong.. its one thing not to have oversized tyers to stop hudroplaning ect but thats just redicuous.. thoes would give you crap all grip, but i suppose you would ge no movemant of the side walls (not alwase a good thing in road driving)

but hey if you wanna look gay and fall off the road feel free... just dont be around me wen you do it

[AE86less]

It's not what i would choose for any of my cars (Can you imagine an ae82 looking like that hot hatch^^ ?) and i also enjoy driving my car more when the tyres are not failing, but i can certainly appreciate the look on other peoples cars!


Stretched tyres look soooo damn sweet.

[Bling]

but hey if you wanna look [person of homosexual orientation] and fall off the road feel free... just dont be around me wen you do it

don't get too upset man, some people would think drivng around oldschool toyotas is gay too, but name calling doesn't achieve anything

i'd be more worried about anything with eagers or similarly shite tyres on it trying to get its drift on to impress the ladies

[holden_fan2005]

I'd have a stretched tyre over a ballooning tyre any day... although a set of 13x5.5 Cheviot Turbo's running 215/60's is sooooo appealing.

Hey hey its 205/60's on mine

[touge rolla]

the 215's on the 8" I have at the front is all the stretch I will ever need.
"drift spec" fads have grown to the point of just being irritating, almost as irritating as those fully kitted out badass D1 Spec Skylines around, then you hear them take off and get that distinctive tinny noise of an NA RB and an auto trans

[AE82 FXGT]

I have to admit a little bit of strech or a very flat sidewall looks appealing to me, but those pics posted up look very messed up and wrong.

[RedMist]

its done to reduce sidewall flex to aid handling, and to get more traction.... most people think wider tyre= more contact to the road then think more traction BUT when you think about it its the pressure the tyre is excerting on the road so espally in light cars bigger tyre= less pressure spread across the contact patch and less traction... it comes even more into play in the wet.

but most people just do it for the drifter look auuu

and frost post up those pics or pm them to me... Chur

aid handling?? Say what? You are seriously yanking my crank arent you?
More traction?? Please inform me on how reducing a contact patch and forcing it into a distorted pattern can aid traction.
I can see no benefit in stretching tyres. You may be reducing sidewall flex however the flex is designed into the tyre to keep contact patch on the road. Again I can only see this as a disbenefit.
So what do you get from a stretched tyre, a smaller distorted contact patch, the propencity to loose traction through low sidewall flex with the added benefit of having the bead let loose at any moment. Fantasitc for a sport when you dont want traction, useless for the road.

[frost]

Yoko A539's are a good bet as far as sidewall goes...

thats whats on my long champs now, good tyres
i'll get pics tomorrow morning.

destroying the tire bead and causing tire failure, either during
installation or aggressive driving

in all the DIGP i've watch and thats prob more then most on here, i've only seen one incident where wide rims with stretch tyres have failed.
and thats as much punishment as your gona give a tyre with stretch.

that was on a ae86 that clipped the edge of the pavement and the tyre slipped off both beads then clipped the other side of the pavement and returned the tyre to its former self, back on both beads and he kept drifting the whole time!!!!

[Grrrrrrr!]

Some awesome stretch, best I could find at short notice.

gotta love those non-road legal cars.. hope y'all like pink stickers!

http://www.landtransport.govt.nz/certif ... 0-v3-2.pdf

Look at table 10-1-1
Those wheel/tyre combos fail in both categories.

[Adydas]

biog room to argue tho...

"are an appropriate selection for rim width, and"

[RedMist]

Practice > theory.

Never seen a drifter have any troubles with them, and they run some fairly excessive stretch and one would think some pretty extreme lateral loads on their sidewalls.

Actually I think you would be amazed at how little lateral load they have on a spinning tyre. It's probably in the realms of a tenth of the lateral G's exerted on a Formula 1 "balloon" tyre. If stretching performs so much better than a correctly fitted tyre then why arent they fitted to proper race cars? I've never seen tyre stretch on a rally, road race, touring car, offroad race, formula, sprint... even dirty roundy rounders.
I'm not here to debate, I just dont think you should promote tyre stretch as a performance enhancement as it is clearly not. At best you're increasing inertia (by having too much rim weight) and loosing a bit of traciton, at worst you are creating an explosive and possibly catestrophic situation..... all for a look..... which I personally "limp pinky" at.

[Grrrrrrr!]

biog room to argue tho...

"are an appropriate selection for rim width, and"

SFA room to argue really when tyre manufacturers provide data saying a 205/40/17 tyre is suitable for rims 7.0 - 8.0 inches wide.

And in every case the maximum recommended rim width is narrower than that the tread width of the tyre.

eg:
http://www.bridgestonetire.com/tiresele ... ct_ID=1063

[Bling]

Grrrrrr!, did you even look at the cars? notice the NON NZ plates.... do they have plates like that driving around new zealand? nah didn't think so. Pink sticker cars in a different country.... you can try i guess on your conquest to prove all wrong


Redmist, Snoozin never mentioned "rally, road race, touring car, offroad race, blah blah"

to be fair he only mentioned them on drift cars, which isn't classed as "racing" is it?