C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old 10-20-2023, 08:17 PM
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split63
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Default Explosion

My 70 LT1 has been in the garage for about a year untouched. The garage is cool. Highs have been in the 60'sF.
I noticed that the back tire was flat.

This is what I found. This is a 2019 tire, with zero miles on it. It must have happened last week, when I was traveling.

This is what it looked like before I left




This is what I found when I returned


Old 10-20-2023, 08:41 PM
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67:72
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Well, that ain't good...
Did you buy it in 2019 or was it made in 2019? Check the date code on the tire to determine age since manufacture, then check the others.
Take it to a BFG dealer as a warranty and be thankful you weren't driving it at the time.
Old 10-20-2023, 10:17 PM
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MidShark
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Holy crap!!
Old 10-21-2023, 12:12 AM
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mikem350
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Default Call them Maypops

Cause they "May Pop" at any time...
Common problem with old Radial T/As. I unknowingly stuck my hand under the car one day and cut myself on the steel belts as the tread had separated.
Also had another pop like that while sitting in the garage! No more T/As for me!!
Old 10-21-2023, 08:02 AM
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Tampa Jerry
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Glad it happened in the garage. What size is the tire and the Ansen rim? From the picture, it looks like the either the tire is to narrow for the rim or the rim is too wide for the tire. Jerry
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Old 10-21-2023, 08:45 AM
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^^^^^this ^^^^^
Somebody mounted a somewhat narrow tire on a 10-inch rim.

When a teenager, did that crap all the time. Tire shops had a strap around the tread to "force" the tire sidewall to expand on the tire changer.
Old 10-21-2023, 11:56 AM
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OMF
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The damage was likely done in the summer when it was 100 degrees plus out.....that's my guess. Pictures like this make us with those tires on our cars wonder about our decisions.....
Old 10-21-2023, 01:35 PM
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split63
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The vette has been in an insulated garage for the last year. Prior to that it was outside for a year
I checked the other tires, they are not over inflated.

I can't find a date code on any of the tires. The only codes are shown below. Maybe the date code is on the inward side of the tire




Old 10-21-2023, 02:14 PM
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drwet
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I’ve been running BFG T/As for almost 50 years. (Not the same tires. ) Never had a problem, but then I have always mounted them on the correct size rims. Suspect that has everything to do with the failure.

Last edited by drwet; 10-21-2023 at 03:14 PM.
Old 10-21-2023, 02:27 PM
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gbvette62
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Originally Posted by split63
The vette has been in an insulated garage for the last year. Prior to that it was outside for a year

Originally Posted by split63
This is a 2019 tire, with zero miles on it.

That tire is showing an awful lot of weathering for only having been stored outside for a year. And if it's a 2019 tire, where was it the other two years?
Old 10-22-2023, 03:16 PM
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Prysmian46
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Default Explosion

Originally Posted by gbvette62
That tire is showing an awful lot of weathering for only having been stored outside for a year. And if it's a 2019 tire, where was it the other two years?
The rim is way too wide for the tire width. It looks like the reinforcement strips on the carcass could not hold up to the strain of the increased pressure on them. I would not be surprised if another tire does the same thing. I would not drive the car with those wheels and tires. There are certain rules about how wide a wheel can be with a certain size tire. I am surprised the tech/mechanic even mounted them this way. He should have advised you the wheel was too wide for the tire. Good luck
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Old 10-22-2023, 06:36 PM
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Lt.Mike
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I had a new old stock trailer tire mounted on a rim to use as a spare for my boat trailer. New used tire but it was pretty old as far as manufacturing date goes. It was just sitting on the front of the trailer and one day BOOM ! Sounded like a shotgun. Wasn’t over inflated but it just went. Looked just like yours.
One thing is where did you get the tire from ? A BFGoodrich dealer or Coker ? Coker has license to manufacture and sell the older design T/A with the BFGoodrich logo but its not the same tire. Michelin bought out BFGoodrich and what your buying now is a Michelin compound, a much better tire. That’s why it costs more from the BFGoodrich dealer than it does from Coker.
Old 10-22-2023, 07:20 PM
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Date codes after 2000 are 4 digit - the first two are the month and the last two the year. Codes before 2000 were 3 digit - 2 for the month and 1 for the year.

I agree with the others that the tire is way too narrow for the rim. Time to get baby a new set of shoes!
Old 10-22-2023, 08:26 PM
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I've literally installed tires from earthmover to wheelbarrows and everything in between and this combo did not stress the tire in any way. (a gig at International Tire in Indpls yrs ago)
That's a Mfg. defect.
Old 10-23-2023, 01:21 PM
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I found the date code on my T/A radials on the inside sidewall. They were 17 years old when I looked! They were changed out with new Cobras immediately.
Old 10-23-2023, 02:56 PM
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Tiger Joe
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Originally Posted by 68post
I've literally installed tires from earthmover to wheelbarrows and everything in between and this combo did not stress the tire in any way. (a gig at International Tire in Indpls yrs ago)
That's a Mfg. defect.
how many the installed tires did you stretch out to fit a rim too wide? that first photo of the tire does NOT look correct.

my guess is its a combo- old *** tire stretched to fit a wide rim.
Old 10-23-2023, 10:13 PM
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Originally Posted by Tiger Joe
how many the installed tires did you stretch out to fit a rim too wide? that first photo of the tire does NOT look correct.

my guess is its a combo- old *** tire stretched to fit a wide rim.
We've actually raced figure eight pavement with a '70 series racing recap on a 10" wide rim. Ideal tire to rim ratio is tread width within a 1/4" of rim width.
This "explosion" is dry rot , but since I couldn't see the "dry rot" , or know the tires were 17 yrs old, the only other explanation would've been an internal defect.

But definitely nothing to do with the rim width, (just "old *** tires" ) !
Old 10-23-2023, 10:15 PM
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This happened to a coworker's tire last week. Coincidentally, also a 2019 tire. September.

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