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Speaking of the bad (factory) new-tire sidewall...

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Speaking of the bad (factory) new-tire sidewall...

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Old 06-16-14, 06:30 PM
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Speaking of the bad (factory) new-tire sidewall...

What say you?

Salesperson at the lbs blankfacedly declaimed this a sidewall cut--for a good while. It aint. Why do people hold firmly to their being right despite their own eyes?


















I've'a good reason--in my opinion--my not noticing this at the pos.

Last edited by dprayvd; 08-05-17 at 08:02 AM.
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Old 06-16-14, 06:44 PM
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What do you think it is?
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Old 06-16-14, 06:55 PM
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Originally Posted by shelbyfv
What do you think it is?
Thanks--I wanted to ask the same question, but didn't want to look ignorant . . .

EDIT: Well, OP obviously thinks it's a manufacturing defect, for which he should receive a replacement tire; but I can't draw that conclusion from the picture. My knowledge of tire construction is skimpy at best.

Last edited by ClarkinHawaii; 06-16-14 at 07:02 PM.
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Old 06-16-14, 06:57 PM
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i would remove the tire and inspect the cut(s) closely and see if they continue into the bead, if so, it would be convincing evidence, to me at least, that it is most likely a manufacturing defect.
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Old 06-16-14, 06:57 PM
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Wow. Blasted by the first two posters.











reminder to self, must arrive correct....

Last edited by dprayvd; 06-16-14 at 07:02 PM. Reason: passive/agressive i know my bad sry
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Old 06-16-14, 07:02 PM
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how was it that you
did not notice it when you
installed the tire
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Old 06-16-14, 07:05 PM
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The tire's a bontrager hardcase. Shoulda said that.
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Old 06-16-14, 07:06 PM
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Originally Posted by Wilfred Laurier
how was it that you
did not notice it when you
installed the tire

Diopter of +4 and gettin' gawdammed weary of it?
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Old 06-16-14, 07:07 PM
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[QUOTE=dprayvd;16856764]Wow. Blasted by the first two posters.

Sorry, sorry--no blast intended--pretty well must be manufacturing defect or sidewall cut, but I lack the expertise to determine which. HH's idea above sounds good. ........
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Old 06-16-14, 07:13 PM
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We're all good.
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Old 06-16-14, 07:17 PM
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Originally Posted by dprayvd
The tire's a bontrager hardcase. Shoulda said that.
upon second look
A flaw under the rubber =
factory defect
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Old 06-16-14, 07:34 PM
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Originally Posted by Wilfred Laurier
upon second look
A flaw under the rubber =
factory defect
Why couldn't a sidewall cut extend under the rubber?
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Old 06-16-14, 07:36 PM
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maybe they could but
most cuts come from the outside
sharp things or brake pads
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Old 06-16-14, 07:38 PM
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maybe the cuts got made
when handled by the bike shop
then booted and sold
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Old 06-16-14, 07:38 PM
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Fabric tear.

Could be from a cut at the tread, or a pinch/snakebite (look for a dent in the rim). Otherwise, especially is a new tire, it's a defect (and I rarely call things defective)
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Old 06-16-14, 07:40 PM
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I was thinking of vandalism--knife cuts, perhaps? The cut on the left is parallel with the ridges of the sidewall material, but the one on the right is not . . .
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Old 06-16-14, 07:40 PM
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i have received treks
new in box from taiwan trek
tubes already patched
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Old 06-16-14, 07:44 PM
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At some point, hopefully, someone will explain why it is so obviously a defect and not a cut. I've never had a tire with a defective sidewall so I'm happy to learn. Were you able to convince the LBS that it was defective? It does look like the rim is a little bent above the left cut/defect.
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Old 06-16-14, 07:49 PM
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It looks as if the casing was cut even before it went into the curing press at the tire factory. Looks to me as if somebody made a bad cut when they were laying up the tire casing on the tire building machine.
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Old 06-16-14, 07:54 PM
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Originally Posted by FBinNY
Fabric tear.

Could be from a cut at the tread, or a pinch/snakebite (look for a dent in the rim). Otherwise, especially is a new tire, it's a defect (and I rarely call things defective)
You offer four scenarios. Which is it?
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Old 06-16-14, 08:06 PM
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Originally Posted by dprayvd
You offer four scenarios. Which is it?
I'm neither psychic, nor do I have the tire in my hand. So, how new is it? and is there evidence of an exterior cause?
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Old 06-17-14, 07:30 AM
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i have changed my mind
its a split in the rubber
at a casing seam

the main question in my mind is
how many miles are on this tire
because i would bet that cracks in the rubber covering the casing
happen to many many tires
especially skinny ones

do a study
look closely at the sidewalls of every skinny tire you see today
and i bet most of them have similar features

and any flaw you need to magnify 4X to see
isnt much of a flaw
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Old 06-17-14, 07:44 AM
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It appears that the outside end of the "cut" has rubber from the molding process spanning the joint in the fabric. Again, how many miles?
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Old 06-17-14, 09:35 AM
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Originally Posted by Wilfred Laurier
i have changed my mind
its a split in the rubber
at a casing seam


the main question in my mind is
how many miles are on this tire
because i would bet that cracks in the rubber covering the casing
happen to many many tires
especially skinny ones

do a study
look closely at the sidewalls of every skinny tire you see today
and i bet most of them have similar features

and any flaw you need to magnify 4X to see
isnt much of a flaw
My first thought when viewed.
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Old 06-17-14, 10:03 AM
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Originally Posted by FBinNY
I'm neither psychic, nor do I have the tire in my hand. So, how new is it? and is there evidence of an exterior cause?
I know; no, you don't. Three weeks. Not to my assisted eyes, and the pic I think is sufficiently detailed, no?
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