Cup 2 tire failure - tear at inner lip inside rim

[MikeR397]

This is the 2nd tire in a month that’s done this on my R. The tear is unnoticeable as it’s inside the rim part of the tire, and I just noticed as I had 5lbs of air pressure. Any one else have this happen, thoughts?

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[Tomster]

How old are those tires? What is the date code?

Edit:
I think I see the date code. 4114. Thats the 41st week of 2014.

If they were stored properly, then that really shouldn't be an issue. Were they closeouts from somewhere and did you store them?

 

[MikeR397]

First one was a 14, second one a 16. I’ve had both about a year I’ve stored properly indoors, but prior to that can’t say, they were ebay close outs due to older date code but new. I just find it interesting this happened twice all the sudden in a row. The 14 is a 102y and the 16 is a 98y.

No other issues, grip was just as good as any other Cup 2.

 

[460Fred]

Don’t take this wrong, it’s not an attack on you in any way. eBay closeouts.
So you really have no idea how they were stored before you got them. I’d say there is a common denominator here.
I‘ve never seen anything like that.

 

[honeybadger]

First one was a 14, second one a 16. I’ve had both about a year I’ve stored properly indoors, but prior to that can’t say, they were ebay close outs due to older date code but new. I just find it interesting this happened twice all the sudden in a row. The 14 is a 102y and the 16 is a 98y.

No other issues, grip was just as good as any other Cup 2.

Interesting. I ran quite a few of those close out Cup2s. Must've gotten lucky. Just seems like bad luck. Have you reached out to Michelin? They're pretty good about replacements

 

[firestarter2]

Interesting. I ran quite a few of those close out Cup2s. Must've gotten lucky. Just seems like bad luck. Have you reached out to Michelin? They're pretty good about replacements

as have I but not that old.

 

[MikeR397]

Interesting. I ran quite a few of those close out Cup2s. Must've gotten lucky. Just seems like bad luck. Have you reached out to Michelin? They're pretty good about replacements

Good idea, hadn't thought about contacting Michelin and seeing if they were willing to help. It's not that big of a deal, I got 75%+ of their life used before this happened anyway. I'm more concerned about safety and the whole tire ripping off mid corner.

I've gone through about 20-30 tires in the past 2 years, these two are the only two issues, and both within about 2 weeks apart. One was on a spare wheel mounted last year, one was mounted this spring, so it's not some new dude at the touchless tire mounting machine screwing things up (most likely lol).

 

[MikeR397]

Don’t take this wrong, it’s not an attack on you in any way. eBay closeouts.
So you really have no idea how they were stored before you got them. I’d say there is a common denominator here.
I‘ve never seen anything like that.

The two tires came from different sellers on ebay, at different times purchased (apart by about 8 months). The second tire that did this is a 2016 year tire, which I purchased in mid 2019 and stored in my home. There's not much time before that that any improper storage could have caused some weakening of the exact same inner part of the tire.

These are two pretty diverse samples, one a 102y, one a 98y, one a 14 and one a 16, different ebay sellers purchased about 8 months apart, mounted about a year apart by my dealer on different carbon rims. Both of these are front 305/30/19 tires on the R (this has not happened on a rear tire), and neither were used on the car at the same point in time together, yet within 2 weeks apart I had both of these failures. The 102y first failure you could see the crack outside the rim, the second failure there was zero evidence of it looking at the wheel with the tire installed, but as I said, I knew something was wrong as it was 5lbs of pressure when I started the car in the morning.

I'm still confused how all this fits and why...

 

[DrumReaper]

Ummm, same wheel?

 

[key01]

Almost looks like someone took a sharp box cutter and ran it around your wheel. Very weird

 

[MikeR397]

Ummm, same wheel?

No. Not mounted to same wheel.

 

[MikeR397]

Almost looks like someone took a sharp box cutter and ran it around your wheel. Very weird

Ya but not possible as this is hidden under the lip of the rim, totally unseeable on the 98y. You could see some of the tear above the rim on the 102y. The 102y totally separated and had the inside steel cable poke out at the end. The 98y was 75% torn around but still otherwise intact and unnoticeable.

this is on the outside inner lip of both tires by the way, not inside.

 

[fatbillybob]

I'm surprised a reputable shop would mount tires that old. Definately consider a date issue if it clears dynamically.

 

[460Fred]

Just sent your pictures to a friend that’s been in the tire business for quite a while.

 

[460Fred]

Just sent your pictures to a friend that’s been in the tire business for quite a while.

The only thing he said was possible low pressure but I’m thinking the TPMS sensor did not alert you.
He also asked “what did Michelin say”.

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