Tyre damage - what could cause this?
Tyre damage - what could cause this?
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M4cruiser

Original Poster:

5,106 posts

178 months

Thursday
quotequote all
I'm not going to ask "should I replace this" like some people do, because when I saw this I immediately put the spare tyre on and ordered a new one. The car had been driving normally, so I don't really know when this happened, possibly when the other half was driving it. redface It's supposed to be a decent quality tyre (Good Year), not some cheap junk.

But what could cause this? It looks odd. Zoom in and you'll see some small circles, which a friend of mine pointed out, I hadn't spotted them. One of those circles is at the sidewall end of the cut/crack.


shtu

4,481 posts

174 months

Thursday
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Second photo has some white scrape marks. Rather like it's been kerbed.

CoolHands

23,285 posts

223 months

Thursday
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It’s a reaction to rolling too slowly

donkmeister

12,725 posts

128 months

Thursday
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Potholes do weird things. My S2000 has what looks like kerb damage on the wheels that can only have been caused by potholes. The wheels were pristine, potholes sprung up everywhere, I've never hit a kerb but it looks like I have.

So my suspicion is that the sharp edge of a pothole has caused this.

aterribleusername

628 posts

91 months

Thursday
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The little circles are mould marks from the manufacturing process. The cut is probably from something sharp you've driven over, see it all the time in my truck's tyres from delivering to building sites.

kestral

2,214 posts

235 months

Thursday
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Wrong forum.
Home mechanics is were you should be.

Steve-B

981 posts

310 months

Thursday
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I had an almost identical split show up on a Pirelli tyre and it was because of extremely sharp pothole. I was able to backtrack to where & when on the day, contacted our normally useless as £$%^ council who fixed the pothole...yet refused my pothole damage tyre claim.

GreenV8S

31,009 posts

312 months

Thursday
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Steve-B said:
contacted our normally useless as £$%^ council who fixed the pothole...yet refused my pothole damage tyre claim.
I suspect you'll find they only accept liability if the pothole has already been reported as dangerous and they have failed to fix it within a reasonable time. Surprise surprise, always seems to turn out that you're the first person to report it.

Pica-Pica

16,512 posts

112 months

Thursday
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Yes they circles are moulding points
They slit? It seems like a rotational twisting of the tyre, dry steering?

MightyBadger

4,512 posts

78 months

Thursday
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Damage from pothole/rock/kerb.

underwhelmist

2,043 posts

162 months

Thursday
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kestral said:
Wrong forum.
Home mechanics is were you should be.
Yes, this tyre-related post with big picture of a tyre and asking about the possible cause of damage to said tyre obviously doesn't belong in the Suspension, Brakes and TYRES forum biggrin

M4cruiser

Original Poster:

5,106 posts

178 months

Thursday
quotequote all
underwhelmist said:
kestral said:
Wrong forum.
Home mechanics is were you should be.
Yes, this tyre-related post with big picture of a tyre and asking about the possible cause of damage to said tyre obviously doesn't belong in the Suspension, Brakes and TYRES forum biggrin
Thank you for pointing it out, and for moving it, whoever did.
I browsed the list and couldn't see it, even after reading your post it took me a while .... I wonder why it's amongst the "marques" subsections, between Porsche and TVR? Yes Technical begins with T but it seems misplaced.

M4cruiser

Original Poster:

5,106 posts

178 months

Thursday
quotequote all
Pica-Pica said:
Yes they circles are moulding points
They slit? It seems like a rotational twisting of the tyre, dry steering?
Definitely not dry steering, it's the rear nearside tyre!

Moulding points? Don't think so, I've had a look at the identical tyre on the other side and can't see any of them there. They are also rather irregularly spaced.


E-bmw

13,268 posts

180 months

Thursday
quotequote all
M4cruiser said:
Pica-Pica said:
Yes they circles are moulding points
They slit? It seems like a rotational twisting of the tyre, dry steering?
Definitely not dry steering, it's the rear nearside tyre!

Moulding points? Don't think so, I've had a look at the identical tyre on the other side and can't see any of them there. They are also rather irregularly spaced.
They aren'y random though are they?

Looking at the first row from the tread there is a blob before & after each "sipe" then there is a row in between, then another row before & after each sipe.

underwhelmist

2,043 posts

162 months

Thursday
quotequote all
M4cruiser said:
Thank you for pointing it out, and for moving it, whoever did.
I browsed the list and couldn't see it, even after reading your post it took me a while .... I wonder why it's amongst the "marques" subsections, between Porsche and TVR? Yes Technical begins with T but it seems misplaced.
Oh, I didn’t realise it had been moved here from elsewhere. I’ll get me coat.