Author Topic: tire punctures and speed ratings  (Read 4486 times)

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Offline 1045

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tire punctures and speed ratings
« on: July 01, 2019, 06:52:26 PM »
The tires are goodyear eagle front runners 4.5 X 29, while prepping for 2019 I found a small puncture in one of my tires  and had it patched. the tires are rated for 300 mph. how much does that patch take away from the tires speed rating. the car is just capable of speeds of 150 to 200 and the record in the class it falls under is somewhere around 250.
Plan ahead, that way you don't have to do anything right now.

Offline RaceEngineer

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Re: tire punctures and speed ratings
« Reply #1 on: July 01, 2019, 11:13:57 PM »
I'm no expert but I'd bet Goodyear would tell you that tire is junk (given liability fears, etc).  SCTA would likely have the same view.

Practically speaking the size and location of the damage would likely impact how you might evaluate the level of impairment.  I would not run it .

Offline noboD

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Re: tire punctures and speed ratings
« Reply #2 on: July 02, 2019, 07:23:33 AM »
What would Burt Munro do?

Offline RaceEngineer

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Re: tire punctures and speed ratings
« Reply #3 on: July 02, 2019, 08:49:21 AM »
That thought crossed my mind.  I'm with you in spirit.  Guess you just can't get quality shoe polish these days. 

Offline Stainless1

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Re: tire punctures and speed ratings
« Reply #4 on: July 02, 2019, 09:16:44 AM »
I planned to stay out of this.... but....

What's the worse that can happen?  If you can live with the answer then run it....

But my liner crash may have been the left front going flat.... Flashpoint was a tire going down... Hey, it didn't kill either of us....
So what't the worse that can happen   :|
Stainless
Red Hat 228.039, 2001, 65ci, Bockscar Lakester #1000 with a little N2O

Offline noboD

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Re: tire punctures and speed ratings
« Reply #5 on: July 02, 2019, 11:19:31 AM »
That thought crossed my mind.  I'm with you in spirit.  Guess you just can't get quality shoe polish these days.
I was thinking more of how when he cut the tread off his tires with his neighbor's butcher knife he cut into the cord on the front tire. Instead of throwing it away he indexed it to the valve stem so he knew where the cut was when he rolled up to inspection he could push it far enough so as the cut was hidden by the front fender. It's in the book, not the movie.

Offline 1045

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Re: tire punctures and speed ratings
« Reply #6 on: July 02, 2019, 11:54:15 AM »
I've thought about it overnight and decided to replace it, make a good wall hanging in the shop, the inner liners on these tires are so thin that any buffing before the patch goes on exposes the cord. not worth risking a 20 K build for a $600 tire. much less injury to me, I'm old and don't bounce back that well. Thanks for your input.

« Last Edit: July 02, 2019, 11:56:31 AM by 1045 »
Plan ahead, that way you don't have to do anything right now.

Online Seldom Seen Slim

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Re: tire punctures and speed ratings
« Reply #7 on: July 02, 2019, 01:18:38 PM »
 :cheers: :cheers: :cheers:
Jon E. Wennerberg
 a/k/a Seldom Seen Slim
 Skandia, Michigan
 (that's way up north)
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Owner of landracing.com

Offline Stainless1

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Re: tire punctures and speed ratings
« Reply #8 on: July 02, 2019, 02:32:31 PM »
Hopefully you are not paying more than $223 for front runners, landspeeds are going for about $700 these days
Stainless
Red Hat 228.039, 2001, 65ci, Bockscar Lakester #1000 with a little N2O

Offline ronnieroadster

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Re: tire punctures and speed ratings
« Reply #9 on: July 02, 2019, 03:01:53 PM »
What would Burt Munro do?




  More shoe polish?
Working in the shop I use the 'F' word a lot. No not that word these words Focus and Finish go Fast and Flathead Ford!
 ECTA  XF/BGRMR Record 179.8561
 LTA    XF/BGRMR  Record 200.921 First  Ever Ford Flathead Roadster to hit 200 MPH burning gasoline July 2018
 SCTA  XF/BGRMR Record 205.744  First gas burning Ford flathead powered roadster to top 200 MPH at Bonneville August 7, 2021 top speed 219.717
 SCTA  XXF/BGRMR Record 216.131 plus a Red Hat
"Life Member of the Bonneville 200 MPH Club"

Offline 1045

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Re: tire punctures and speed ratings
« Reply #10 on: July 03, 2019, 01:04:55 PM »
A little follow upon the tire for anybody in the same boat as me later, had a conversation with the guy at Shely and asked him about the puncture. his comment was that because the tire was punctured and the way the tire is laid up the cord was more than likely severed, and that his experience with patches was they didn't stick that good to the type of inner lining used in them and that it was not worth the risk, in other words shoe polish won't work. :-D The price has gone up considerable, I believe I paid around $580 when I bought them , they are now $690 but that's racing.
Plan ahead, that way you don't have to do anything right now.

Offline jl222

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Re: tire punctures and speed ratings
« Reply #11 on: July 03, 2019, 05:04:09 PM »
 
  What's the speed rating on regular front runners we ran 288 mph with a 279 exit speed in 1984 with
 regular front runners with no problems.And a bunch of times over 270-280.

  When the 300 mph rated came out and rule change, we bought them and several pairs since do to sidewall checking and being cautious.

                 JL222