Regular Tyre Flats - Root Cause??

How did the mechanic (or you) not see this crazy worn tyre when it burst the first time? or 2nd time for that matter.

Go to a mechanic and ask them to check the entire wheel/shock assembly for worn/bent/fckd components.
 
I think there could be a slight possibility that the punctures on the same wheel could have been a series of unfortunate but totally unrelated incidents.

I also have a theory, still looking for picture of a mag to ascertain if my theory makes sense.
 
Okay ladies and gentleman, behold my theory.

I just had a look at my mag wheel, these are my findings, the inner side of the mag has a 'step' that makes it lower than the outer, I am thinking it could be something to do with trying to balance the hollowed inner of the wheel. It therefore makes sense that in the event of a puncture the loss of pressure could result in a situation where more stress is exterted on the inner more that it is on the outer, resulting in the damage that we see on OP's tyre, the mere design of the mag which has a face and and the hollow inner part does support the theory that it is possible to have the damage more pronounced on the inner than the outer while driving on a flat tyre.
 
thechamp said:
Okay ladies and gentleman, behold my theory.

I just had a look at my mag wheel, these are my findings, the inner side of the mag has a 'step' that makes it lower than the outer, I am thinking it could be something to do with trying to balance the hollowed inner of the wheel. It therefore makes sense that in the event of a puncture the loss of pressure could result in a situation where more stress is exterted on the inner more that it is on the outer, resulting in the damage that we see on OP's tyre, the mere design of the mag which has a face and and the hollow inner part does support the theory that it is possible to have the damage more pronounced on the inner than the outer while driving on a flat tyre.
Click to expand...
Where is this "step"? Are you saying the flange diameters are different for the inner versus the outer edges of the rim?
If that is so, the tyre would "bulge"more on the inside than on the outside, which could well be why there was that extreme wear?
Interesting observation.
Back to one of the first questions someone asked on the forum. What rims are installed on the vehicle, are they appropriate for the vehicle and how do they differ to the OEM rims?
 
IMG_20190405_192555_011.jpeg

I think it is a leaking rim. The previous time it went flat, I was reinflating the tyre and it would run then flat again after 100 km.
 
Ok, so I need to test my generator this weekend.
But my manual says this:
IMG_20190405_193019_299.jpeg

Given that Jhb is at an altitude of 1753m, I guess that the generator would need a "retuning".

Now what is a "retuning"?
 
Geoff.D said:
Where is this "step"? Are you saying the flange diameters are different for the inner versus the outer edges of the rim?
If that is so, the tyre would "bulge"more on the inside than on the outside, which could well be why there was that extreme wear?
Interesting observation.
Back to one of the first questions someone asked on the forum. What rims are installed on the vehicle, are they appropriate for the vehicle and how do they differ to the OEM rims?
Click to expand...

This is what the rim looks like:

IMG_20190404_110554.jpeg
 
Trust|Nobody said:
Ok, so I need to test my generator this weekend.
But my manual says this:
View attachment 642446

Given that Jhb is at an altitude of 1753m, I guess that the generator would need a "retuning".

Now what is a "retuning"?
Click to expand...
It depends on the make. What should happen is the supplier must change the jets in the carburetor.
Get hold of the supplier and find out from them if the generator has been adjusted for altitude or not.
See the other thread on generators for more details.
 
thechamp said:
That is just how these type of tyres look, high profile and round. Another thing to mention is that high profile tyres don't cope too well with underinflated driving.
Click to expand...

Yes my 2006 spark (which I had briefly) also had these type of puffy tyres on the stock rims. It's just how they look.
 
I think I have an explanation now.
The tyres were way over inflated.

I bought my own pressure gauge and I discovered that the gauges at my local garage were not working correctly. Their gauges were 1 bar too low during measurement. My tyres were inflated to 3.2 bars!!

Some of their gauges are correct some aren't.

This overpressure is what I think caused the burst tyre.
 
Trust|Nobody said:
I think I have an explanation now.
The tyres were way over inflated.

I bought my own pressure gauge and I discovered that the gauges at my local garage were not working correctly. Their gauges were 1 bar too low during measurement. My tyres were inflated to 3.2 bars!!

Some of their gauges are correct some aren't.

This overpressure is what I think caused the burst tyre.
Click to expand...

Doubtful.

Tyres can do up to 18 bar before they pop, so being a bar over isn't going to matter much.

Likely you've got some rim damage affecting the bead.
 
tRoN said:
Tyre looks quite bloated on the rim?
Click to expand...

Unless these are tubed tyres they can't really bloat.

The old overpressure causes flat spots in the middle story is somewhat of a relic of the old days of tubed tyres.
 
SauRoNZA said:
Doubtful.

Tyres can do up to 18 bar before they pop, so being a bar over isn't going to matter much.

Likely you've got some rim damage affecting the bead.
Click to expand...
Agree with this. If your tyres were overinflated, all that happens is that the ride is harsher, and the centre of the tyre will wear a bit faster than the edges.
 
Trust|Nobody said:
I had the rim checked. They said no leaks from it.
I think the tyre was overinflated and was rubbing against the inside of the car.
Click to expand...

If your tyre is that close to the car body something is very very wrong. You should have many many centimetres if not tens of centimetres between the tyre and the body.

Unless you have completely the wrong size tyre or rim fitted that should be pretty much near impossible.

Overinflation does not suddenly a super wide tyre make, as I explained before we aren't in the age of tubed tyres pushing out the body of the tyre any longer.
 
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