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Old 08-18-2005, 05:57 PM   #1
t-rex25
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Default Speed Rating of a punctured track tire

The title says it all. I had a screw puncture one of my almost new Pirelli P-Zero Corsas. I am deciding if I want to buy a new tire or get this one repaired. I am obviously going to be using these as my track tires. They are a Y rated tire.

I was planning on getting the tire plugged and patched. I've had a lot of different opinions on repairing a track tire......some people say I've done it and everything was fine and other people say it's not worth it, go ahead and replace it. The tracks I run are Blackhawk Farms, Autobahn Country Club, Gingerman, and Road America. The only track I am concerned with as far as speed is Road America. Just want to get people's opinion and experiences on getting a tire patched and plugged.
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Old 08-18-2005, 06:11 PM   #2
USA1
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I asked the manager at Discount Tire and he said repairing a flat knocks it down one speed rating. I forget, though, if he said how many repairs, it might not be just one repair per speed rating, so you should probably just call your local tire ratailer or the manufacturer even.
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Old 08-18-2005, 07:35 PM   #3
jweiss
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I've done it and everything was fine

This was on a Kumho Victoracer. I had it patched from the inside.
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Old 08-18-2005, 08:36 PM   #4
gregr01
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I've done this too when I was younger and less risk averse, and in a car that didn't go nearly as fast (and had a cage, fire system, etc.).

I'd have to say now, with all the $ I have into my car, I'd suck it up and buy a new tire for track use. Autox or street use no problem--if properly patched.

You'll probably be okay, but if it fails at Road America you're going to have a big problem.
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Old 08-18-2005, 10:24 PM   #5
t-rex25
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Quote:
Originally Posted by USA1
I asked the manager at Discount Tire and he said repairing a flat knocks it down one speed rating. I forget, though, if he said how many repairs, it might not be just one repair per speed rating, so you should probably just call your local tire ratailer or the manufacturer even.

I was told by a guy @ firestone that rating would go from a Y (which is 186mph) to an S (which is 112mph). Now I don't know if he is saying this to try and sell me a tire or if he is actually telling me the truth.
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Old 08-18-2005, 11:51 PM   #6
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I had a W rated tire plugged and patched- I had them follow this exact protocol:

http://www.policedriving.com/article77.htm

I ran one track day on it w/ no issue. A month later got another puncture- amazingly in the same tire- they were getting close to the end and I just retired them.
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Old 08-19-2005, 08:41 PM   #7
t-rex25
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Quote:
Originally Posted by BIGSKYWRX
I had a W rated tire plugged and patched- I had them follow this exact protocol:

http://www.policedriving.com/article77.htm

I ran one track day on it w/ no issue. A month later got another puncture- amazingly in the same tire- they were getting close to the end and I just retired them.

Interesting info. I assume if other manufactures follow this same procss then the speed rating should still apply. This is the only and hopefully the only puncture on my Pirelli. This gives me more confidence to get it repaired.
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Old 08-21-2005, 07:29 PM   #8
t-rex25
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Anyone else have an experience with a patched and plugged tire.
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