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Author Topic: Tires  (Read 637 times)

Online FlaminRoo

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Tires
« on: September 15, 2021, 04:31:57 PM »
Jim Higgins had a rear tire destroy itself at 190mph on Bonneville at the SCTA Speedweek event this year, Jack Frost had one go at 240mph at the Straightliners event at Elvinigton this past weekend,, both tires "appear" to have suffered the same/similer failure, in that there was a section completely separated from said tires,,

I'm not computer smart so if somewon could post photos, apricate it,,

In the interest of safety lets get the conversation started
« Last Edit: September 15, 2021, 04:33:28 PM by FlaminRoo »
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Offline RansomT

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Re: Tires
« Reply #1 on: September 16, 2021, 08:21:02 AM »
From my sources, the tire that seperated at Elvington was a  Dunlop Sportmax GPR300.
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Online FlaminRoo

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Re: Tires
« Reply #2 on: September 17, 2021, 05:57:51 AM »
im told that Jims tire was a brand new Bridgestone R-11
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Offline zrxdean

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Re: Tires
« Reply #3 on: September 17, 2021, 01:57:56 PM »
It would be interesting to know what tires failed, and those that didn't fail. With different surfaces, HP, weight, speeds, there are lots of factors to untangle. Probably not enough data points to make much sense of it. Maybe if all the sanctioning bodies required record keeping from the racers, but I don't see that happening.

Online FlaminRoo

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Re: Tires
« Reply #4 on: September 17, 2021, 04:25:09 PM »
Tire failure in the past has been mainly due to blistering, however these two recent failures are next level, as tho somewon took a dropsaw and cut a section out, causing the tire to completely part company with the rim,,

As stated in my above comment, I do not have the computer smarts to share photos, if somewon on here could post  photo's of Jim's and Jack's tire failures, it would be pretty much self explanetery  :)
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Online firemanjim

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Re: Tires
« Reply #5 on: September 30, 2021, 12:35:23 PM »
Will try--mine first, then jack's
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Offline zrxdean

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Re: Tires
« Reply #6 on: October 04, 2021, 11:25:04 AM »
I've never seen a tire fail that way - how the hell could the radial fiber / thread separate at one point like that? I can't imagine how anything could cut all the way through a tire?

Online Oz Booster

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Re: Tires
« Reply #7 on: October 04, 2021, 03:35:23 PM »
Yeah give me the old chunk the middle out of the tire any day over that
That was the first of the new tires to see use, the old BT003 are all timing out and those RS11 and 10 were to be our replacements , Jim and i had talked it over a bit and the later generation tires seemed to be a good option to replace the old reliable ones
The Aussie bikes had them mounted in March and never turned a tire due to wind then rain, fairly sure i will be removing them and going to something like the Dunlop slicks Ralph used to run

I have had one go sort of like that on the dyno, i suspected it lost some air first as it felt odd just before the bang , tire seemed to begin delaminating then tore as it jammed
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Offline sportbikeryder

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Re: Tires
« Reply #8 on: October 05, 2021, 08:48:10 PM »
Yeah.
..fuck that.
No thanks.  I'll stuck to 1/4 mile LSR.

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Offline zrxdean

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Re: Tires
« Reply #9 on: October 06, 2021, 10:20:26 AM »
Since the SCTA is a bit picky about 200+ tires, and the manufacturers change their naming frequently, I bought a set of Michelin slicks, that have the harder middle compound. Will try on salt next year I hope. One thing to be careful of with slicks is that they are mounted in the correct direction. My local shop asked me if it mattered  :shock:

Online FlaminRoo

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Re: Tires
« Reply #10 on: October 07, 2021, 07:21:47 PM »
"Thanks Jim" for posting pictures,, Was discussing this with Stevieboywonder and we are thinking that there is, at first, a cross sectional failure due to pressure loss (?????), then the second and third failures are due to the tire whipping into the rear subframe/swingarm :?
« Last Edit: October 07, 2021, 07:27:33 PM by FlaminRoo »
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Online FlaminRoo

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Re: Tires
« Reply #11 on: October 08, 2021, 07:10:48 PM »
Yeah give me the old chunk the middle out of the tire any day over that
That was the first of the new tires to see use, the old BT003 are all timing out and those RS11 and 10 were to be our replacements , Jim and i had talked it over a bit and the later generation tires seemed to be a good option to replace the old reliable ones
The Aussie bikes had them mounted in March and never turned a tire due to wind then rain, fairly sure i will be removing them and going to something like the Dunlop slicks Ralph used to run

I have had one go sort of like that on the dyno, i suspected it lost some air first as it felt odd just before the bang , tire seemed to begin delaminating then tore as it jammed

Greg, can you provide the actual tire/slick designation that Ralph used ?
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Offline justbelle

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Re: Tires
« Reply #12 on: October 13, 2021, 11:09:33 PM »
Will try--mine first, then jack's

RIP tires, I wonder what type of stunt did you do for it to turn out like that.  :bah:

Online FlaminRoo

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Re: Tires
« Reply #13 on: October 15, 2021, 03:50:19 PM »
Will try--mine first, then jack's

RIP tires, I wonder what type of stunt did you do for it to turn out like that.  :bah:

Was no stunt, at 190mph, 230mph,, shits get real, serious safety concern
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Online firemanjim

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Re: Tires
« Reply #14 on: October 18, 2021, 11:46:31 PM »
Hard to say, Ron, it happened really fast--- heard a muffled boom-- sounded similar to when I lost a rod at Colorado Mile-- looked down and saw engine still running and no oil light---then tire left me and I was slowing fast and unable to turn the bike as it dug into the salt.
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Online FlaminRoo

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Re: Tires
« Reply #15 on: October 19, 2021, 06:01:18 AM »
Jim, when it happened you said that you thought something on track may have cut the tire,, now after what appears to have been a similar tire failure on Jack Frosts bike, your thoughts ??
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