What cause this to happen?

 

pirelli cinturato p7

 

Both tyres on inside site.

 

 

Edited 9 February, 20251 yr by Seba800

6 minutes ago, Seba800 said:

What cause this to happen?

 

pirelli cinturato p7

 

Both tyres on inside site.

OK, are you getting any odd, especially rubbing when making tight turns, noises?

What mileage has been done on the tyres, did you have them fitted, have you had any severe or strange front end (when driving) movements recently?.

Edited 9 February, 20251 yr by Stuartqaqc

It would help if you say if these are front or rear tyres, if rear tyres it looks like sawtooth wear?. 

Is that camber related damage? 

 

https://tyregeek.com.au/tyre-delamination

Frony tyers. 120000 km on it. My 2021 summer tyers.

 

I noticed today when i get rewerse drive and little turn sterring wheel it has feling  like vibrating steerring wheel…just little noticable. (New winter tyres)

 

 

When drive is all ok nothing strange.

 

 

 

Sorry i have not write correct km on tyres.

 

Tyres has on around 70000 km.

28 minutes ago, Seba800 said:

Sorry i have not write correct km on tyres.

 

Tyres has on around 70000 km.

 

Looking at the tread left they appear to have done most of that on the sidewall, maybe wheel alignment needed.

Is possible that cause this low preasure in tyres?

50 minutes ago, Seba800 said:

Sorry i have not write correct km on tyres.

 

Tyres has on around 70000 km.

Ok so looking at about 40000 miles, are these tyres on the front or rear? Looking on magnification it does not look like wear to me, seems to be separation of the side wall to the tread area. Possible fault in the jointing of the areas, or damaged during driving, kerbed or potholed. 

Edited 9 February, 20251 yr by Stuartqaqc

Front

Mileage/KM seems to be high for front wheel drive, maybe the age of the tyres is a cause of the failure.

Not that it helps but I am amazed that anybody would keep P7s on for that long. I found them to have the feel, grip and feedback one might associate with having solid rubber. Was extremely happy to ditch them fairly early on.

 

Are they on the correct size wheel?

I would check for broken springs - car sitting too low and so too much camber. Broken springs can be quite hard to see unless you take the wheels off, and even then if an end is missing it can be quite hard to see.

Edited 11 February, 20251 yr by nicknorman

When you compare it to the pattern of a fresh P7, you can see the shoulder tread has been scrubbed away all around the tyre.

 

 

I'd go with it's either been run flat for an extended period, or there's a serious geometry issue.

^^^ I'd suggest tyres have been run underinflated

Same as many above:

- Incorrect camber

- Driven underinflated on long distance

seem possible explanations.

I would add 2 other ones:

- Inappropriate toe out

- Bad manufacturing batch with a defect on the thread.

 

 

seems a lot of tread left for the mileage stated. Irrelevant though anyway.

 

Were the tyres under-inflated when they were removed from the wheel???

 

What did the tyre fitter say may be the cause, or did you remove them yourself???

 

 

On 09/02/2025 at 16:47, Seba800 said:

 

I noticed today when i get rewerse drive and little turn sterring wheel it has feling  like vibrating steerring wheel…just little noticable. (New winter tyres)

 

 

Have you had a garage check this out ????