Wheel shredded

[Faz]

Hi guys, looking for some advice. Apologies if basic question. Recently had a flat left rear and decided to get all new wheels and 2 new rear tyres as nearing the end of their life anyway. When they took the tyre of and showed it to me all the inside was shredded and the inner sidewall almost looked separated from the tyre. They weren't sure exactly why but suggested tracking might need to be done. Just wanted to see if anyone might have any ideas why it happened, plan to get a 4 wheel alignment done this weekend regardless
Thanks
Faz

[Pbondar]

Sounds like you drove some distance while it was flat/ low...that’s what they look like internally when you do that..

[buzyg]

Sounds like you drove some distance while it was flat/ low...that’s what they look like internally when you do that..

Yup agree completely with this.

[Lazza]

Were they run flats that you or someone else has run while flat?

[enuff_zed]

If the tracking were far enough out to shred the inside of a tyre (if that is even possible), I'm sure you would have felt something.

I'm quite surprised the tyre place suggested it in the first place. Did they not even consider it was caused by running it flat?

[kis]

I had something similar happen to mine. When I first got the car I didn’t realise quite how “aggressive” the rear camber is. Had tracking looked at and that was fine. The Zed is set up in a way where the inside will wear quicker than the outside, so if you don’t check the tread depth from inside to outside you could be fooled into thinking that just because the outside shows tread still good, the inside is too.

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[mmm-five]

The Zed is set up in a way where the inside will wear quicker than the outside, so if you don’t check the tread depth from inside to outside you could be fooled into thinking that just because the outside shows tread still good, the inside is too.

To be fair, your outside tread is on/below the wear indicators too - and well below what I'd let road tyres go down to!

[Marlon]

My rear Kuhmo tyre split traveling home on the outside lane of the motorway. Heard a loud vibrating noise, fortunately the steering stayed sharp - pulled over onto hard-shoulder and the RAC arrived with a flatbed. Had both rears replaced with Bridgestones.

This was nothing to do with tracking, there was plenty of tread and they weren't run-flats. I think its a lesson in not scrimping on the cost of tyres for sports car; the previous owner spared no expense on the car but definitely dropped the ball buying tyres

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[kis]

The Zed is set up in a way where the inside will wear quicker than the outside, so if you don’t check the tread depth from inside to outside you could be fooled into thinking that just because the outside shows tread still good, the inside is too.

To be fair, your outside tread is on/below the wear indicators too - and well below what I'd let road tyres go down to!

Yeah it was, but back then I was a bit of a noob with car maintenance stuff. Recently purchased and fresh MOT so I was lulled into a false sense of security. It was probably this very tyre that prompted me to delve so deep into tyres and wheels... hence this thread.

[kis]

My rear Kuhmo tyre split traveling home on the outside lane of the motorway. Heard a loud vibrating noise, fortunately the steering stayed sharp - pulled over onto hard-shoulder and the RAC arrived with a flatbed. Had both rears replaced with Bridgestones.

This was nothing to do with tracking, there was plenty of tread and they weren't run-flats. I think its a lesson in not scrimping on the cost of tyres for sports car; the previous owner spared no expense on the car but definitely dropped the ball buying tyres

IMG_1858.jpg
IMG_1859.jpg

Never seen anything like that!
To be fair Kuhmo's aren't that bad, mid-range. They're similar to Falkens, Avons, Vreds, etc... so pretty surprising. That being said, for the Zed I'd (personally) only get premiums, but thats more for performance. This is like a failure of the tyre itself, something I'd not expect even for budgets! Did the tyre fitter say anything about possible causes?

[Marlon]

My rear Kuhmo tyre split traveling home on the outside lane of the motorway. Heard a loud vibrating noise, fortunately the steering stayed sharp - pulled over onto hard-shoulder and the RAC arrived with a flatbed. Had both rears replaced with Bridgestones.

This was nothing to do with tracking, there was plenty of tread and they weren't run-flats. I think its a lesson in not scrimping on the cost of tyres for sports car; the previous owner spared no expense on the car but definitely dropped the ball buying tyres

IMG_1858.jpg
IMG_1859.jpg

Never seen anything like that!
To be fair Kuhmo's aren't that bad, mid-range. They're similar to Falkens, Avons, Vreds, etc... so pretty surprising. That being said, for the Zed I'd (personally) only get premiums, but thats more for performance. This is like a failure of the tyre itself, something I'd not expect even for budgets! Did the tyre fitter say anything about possible causes?

My Indy was surprised - he also said the other rear was showing signs of failing in the same way. He'd not seen anything like it but suggested upgrading to higher rated rubber.

[BMWZ4MC]

Marlon, perhaps you should send photographs to Kumho, especially if there was a reasonable amount of tread life remaining. I’m sure they’d be interested to know it failed suddenly at motorway speeds since there would be grounds for litigation if injury or death had resulted.

[kis]

Marlon, perhaps you should send photographs to Kumho, especially if there was a reasonable amount of tread life remaining. I’m sure they’d be interested to know it failed suddenly at motorway speeds since there would be grounds for litigation if injury or death had resulted.

I was thinking the same, its not like it was any fault from you, the driver (hitting a curb, etc). It seems like a construction/manufacturing issue. By the looks of it, there was plenty of tread still present.