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I guess I learnt the lesson (about tires) of my life...

1547 Views 14 Replies 10 Participants Last post by  RobRac
Literally. What it says is if you have any doubts about your wheels, double-check, check again, and do not drive!
You may have read my previous post concerning my radar calibration problems. When another issue appeared (power steering jerk, pulling to the left) I was absolutely sure it was electronics related. Obviously I checked the wheel nuts and tire pressure - everything seemed ok. A bit later, when TMPS flashed, I checked everything again, inspected the tires, and calibrated TMPS - at that moment it didn't bother me anymore. I contacted my local dealer and made an appointment expecting my angle sensor to be faulty.
On my way back home (250 miles) I was stupid enough to drive at 90 mph (this was the only speed at which the vibrations were bearable). Luckily, I experienced nothing more than shaky hands and tired eyes.
What I can say for my own conduct is that the mechanics had spent two hours before they realized what the problem was. Only after they had analyzed many other options and cleared the codes (angle sensor of course), one of them noticed this: (photo)
It's only visible when you turn the wheel fully to the left - if it's turned halfway (which I did), there is nothing alarming you could spot. The inner part of the tire (Contiprocontact) is somehow bloated causing its contact surface visibly concave - I have never seen anything like that. I can't help imagining it burst while I'm driving at 90 mph on the busy highway...
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What brand/model tire is that? Was it like that since it was installed?

Sent from my Pixel 3 XL using Tapatalk
A bit later, when TMPS flashed, I checked everything again, inspected the tires, and calibrated TMPS
Trans Marine Propulsion System?
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Wow . . . never seent nuthin like it in my life.
What brand/model tire is that? Was it like that since it was installed?

Sent from my Pixel 3 XL using Tapatalk
Sorry, I edited the post to add some more info. It's a Continental Contiprocontact. And it wasn't like that when it was installed, of course. I really care about my cars and tires despite appearances ;)
So, this is something like cord separation in the sidewalls of the tires? And, you only have that deformation on the one tire? Interesting it hasn't shown wear along the edges of the tire.

- Jack
Is this the same tire that you hit the curb with??
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That belt shift is so common with Continental tires. What is surprising is how much tread is left. Usually as they wear down, I've seen hundreds of Continentals do that across their car and light truck tires. I also see it quite often with old Goodyears.

You are VERY lucky the tire didn't self destruct, as the belt really has no connection to the inner part of the tire and the faster you go, the more chance the centrifugal force will throw the steel right through the outside of the tire, quite spectacularly.
So, this is something like cord separation in the sidewalls of the tires? And, you only have that deformation on the one tire? Interesting it hasn't shown wear along the edges of the tire.

- Jack
Looks like it happened out of a sudden when left the highway gate, but I didn't notice it blaming faulty electronics for all the issues. I was driving like that for some 300 miles because I went to the seaside and had to get back. As I said, at first sight nothing worried me as far as wheels are considered.
Is this the same tire that you hit the curb with??
Nope. It was the other side and was replaced immediately.
That belt shift is so common with Continental tires. What is surprising is how much tread is left. Usually as they wear down, I've seen hundreds of Continentals do that across their car and light truck tires. I also see it quite often with old Goodyears.

You are VERY lucky the tire didn't self destruct, as the belt really has no connection to the inner part of the tire and the faster you go, the more chance the centrifugal force will throw the steel right through the outside of the tire, quite spectacularly.
Yeah, I appreciate my luck. I would have certainly tried to do sth. about the issue If I had noticed anything wrong with the tire. Unfortunately, I was focused on the radar issue (I still am) and neglected other possibilities. Moreover, I was stuck in the middle of nowhere looking for a quiet place to rest during the holidays.
Wow, I was expecting some Pep Boys $39.99 tires, certainly not Conti’s!
A bulge on the inner sidewall? It's called cupping if I'm reading it right. If anyone experiences this, run your hand over the inside of each tire.
Also a learning experience regarding TPMS. Every now and then there is actually a good reason for that light to come on the dash.
A bulge on the inner sidewall? It's called cupping if I'm reading it right. If anyone experiences this, run your hand over the inside of each tire.
There was no bulge on neither sidewall. That's why I didn't notice anything. The inner third of the contact surface kinda lost its reinforcement. I don't know how to call it in English. Happily, it didn't make the tire burst. And this is how it looks inside - the inner (upper in the photo) part is deformed.
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