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Continental GP4000s - tire defect or just regular flat?

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Continental GP4000s - tire defect or just regular flat?

Old 10-28-13, 03:41 PM
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It's really hard to make a definitive call from two cell phone pictures. If all the damage is in the same area on both sides of the tire then they are related. If not, it becomes much more difficult to assess the damage.

Is it possible that a piece of debris that caused the external damage made its way inside the tire and caused the additional damage?

Also, did you ride on the tire after it was flat to get home, for example? This will have an impact as well.
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Old 10-28-13, 03:52 PM
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I vote defect.
I had a defective tire just once, many, many years ago.
In that case, when I inflated a brand new tire, it started making ripping noises, and one section swelled up like a snake that had swallowed a rabbit.
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Old 10-28-13, 07:53 PM
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That looks like a flat from a sidewall cut and the tire damage is from continuing to ride.
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Old 10-29-13, 08:02 PM
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Single hole was not in sidewall. That's right under the tread, right in the meat of the tire.

There was no debris found inside the tire, I ran my fingers along the inside to check (as I do after any flat).

Tire did not lose all pressure, not a blow out. I just felt the tire get a little skittish, and immediately inspected it. The damage to the inside was already present when I took the tire off to change the tube, so while I did ride the tire home, that's irrelevant.

And one quick note: you guys know you can click on the pics to get a bigger image right? I know it's not a scanning tunneling microscope view, but I feel like the pictures are pretty clear

All that said, personally I'm still 50/50 on defect vs bad luck. I really don't know. Oh and I added more pictures to the first post.
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Old 10-29-13, 08:07 PM
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I had a 4000s GP do the same damn thing to me this year. Tire barely had 200 miles on it a had a sidewall blowout...looked exactly like your problem, except on the sidewall...
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Old 10-29-13, 08:28 PM
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Originally Posted by jkcrowell
...I added more pictures to the first post.
All of the slices are in line with the grain of the fabric. DEFECT.
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Old 10-29-13, 08:31 PM
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Originally Posted by jkcrowell
Single hole was not in sidewall. That's right under the tread, right in the meat of the tire.

There was no debris found inside the tire, I ran my fingers along the inside to check (as I do after any flat).

Tire did not lose all pressure, not a blow out. I just felt the tire get a little skittish, and immediately inspected it. The damage to the inside was already present when I took the tire off to change the tube, so while I did ride the tire home, that's irrelevant.

And one quick note: you guys know you can click on the pics to get a bigger image right? I know it's not a scanning tunneling microscope view, but I feel like the pictures are pretty clear

All that said, personally I'm still 50/50 on defect vs bad luck. I really don't know. Oh and I added more pictures to the first post.
It's possible that riding a very soft tire home could do that. If it got a little skittish that's pretty low. It's one possibility. Hard to know for sure. Take it to the shop and
show them the tire. You need a new tire anyway.
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Old 10-29-13, 09:03 PM
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Originally Posted by jkcrowell
And one quick note: you guys know you can click on the pics to get a bigger image right? I know it's not a scanning tunneling microscope view, but I feel like the pictures are pretty clear
I was looking at it on an ipad before and couldn't zoom.

Seeing it now I would not warranty that tire. The cut is bad and sliced the cord which then unwound (as was previously stated by another poster).

Having said that, I would still take it to the shop and see what they can do for you. Since it is a new tire, even if they didn't warranty it for you, they might offer a discount on a replacement to ease the pain (when I worked in retail I certainly would have done that for you).

Good luck.
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Old 11-02-13, 08:10 PM
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I think pic 5 tells more of a story - in that the defect is consistent across a broad area of the tyre. I say defect because the damage is not limited to the one isolated area where you have a through-puncture. Get your lbs to look at it for you.

Good luck.
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Old 11-03-13, 06:47 AM
  #35  
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It's been over a week now, so I'm curious if the OP has been back to the shop to hear their opinion.
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Old 11-03-13, 08:01 AM
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Originally Posted by Bacciagalupe
I had a similar issue with a GP4000s. I think they produced a bad batch recently.
But I thought these tires were God's gift to cycling given the constant stream of praise every time the "what's best" question gets asked!

So...how could this be defective?
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Old 11-03-13, 08:10 AM
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Originally Posted by gc3
But I thought these tires were God's gift to cycling given the constant stream of praise every time the "what's best" question gets asked!

So...how could this be defective?
Demonic possession.
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