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Discussion Starter · #1 ·
Just noticed this split in the front tyre of my 1500 which all looks a bit worrying. I've got a new tyre (another E3) and changing it but wondered whether this is a defect?
It's done 10k and not leaking but I have read of others who have had tyres split and am interested to know whether they start like this?
 

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It aint rocket science
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What is the age of the tire.

I would be leaning towards road trash for the simple fact a chunk of rubber is missing close by.
 

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That is a tire cut from metal or glass debris while you were riding. Tires get cut, unfortunately, and I'd replace the tire, even though it probably didn't cut through the cord, it still weakens the tire.:sadguy:
Gene:waving:
 

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My opinion go's toward deffect yes there is a little dammage in the tire but not the cause.

Tires are made of multiple thin coats of rubber wich are cut at every turn during manufacture. They should not overlap. Rubber material use goes from hard to softer material so you have a hard and riggid base and a soft and adhesif rubber in contact with road .... I think one of the coats of rubber overlaped the other during manufacture then they put it in the oven for making of design threads

I would ask to see the Dunlop REP.

Just my opinion and you have nothing to loose, the worst you get is a NO ( good luck) if you get to see the REP keep us info .........THX
 

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Discussion Starter · #6 ·
Thanks for the replies. I've just finished putting a new tyre on.
I may take your advice Norm and ask the rep what he thinks just for their own information. The bit that bothers me is you can see a hairline split running away from the cut which might suggest it is separating. As it's not 100% clear if it is a defect or riding damage they should know but, as you say, they will probably just tell me to sod off! I'll let you know.
DriverRider - it has a 10/10 date but not put on the bike until much later.
 

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It is odd how the hairline split seems to run over the edge off the main tread. How deep is that cut? It doesn't look nearly as deep as the tread grooves.
 

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Discussion Starter · #8 ·
It is odd how the hairline split seems to run over the edge off the main tread. How deep is that cut? It doesn't look nearly as deep as the tread grooves.
It's about the thickness of a newspaper page. The angle of the split does look like it's peeling at that thickness. We have had some extreme heat on the tarmac lately and I wonder whether that could be a factor too.
 

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Just looks like where two pieces of rubber overlapped during the manufacturing process. Especially how long it is. It may not be deep at all, have you peeked in and see how deep it is?

Cuts from debris is typically 90 degrees perpendicular to the tread, not at a 3 degree slice like that.
 

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It's about the thickness of a newspaper page. The angle of the split does look like it's peeling at that thickness. We have had some extreme heat on the tarmac lately and I wonder whether that could be a factor too.
Extreme heat?

Daytime air temps here run above 100 degrees Fahrenheit for over four months straight. By mid-summer, our roads are getting pretty toasty. It doesn't seem to cause tire problems.
 

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it looks very much like lamination, I had the same problems with e3's
 

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Discussion Starter · #12 ·
Extreme heat?

Daytime air temps here run above 100 degrees Fahrenheit for over four months straight. By mid-summer, our roads are getting pretty toasty. It doesn't seem to cause tire problems.
You are right Dennis. Guess I was grasping at straws looking for a cause.
 

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I'd vote for defect, because of the lines that seem to extend laterally around both edges of the tire from the "cut" area.
 

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Discussion Starter · #14 ·
Oldishwinger and bluewaterhooker0. Thanks for your input. I think you are right. I like the E3 and will stick with them but I will check them more regularly.
 

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Discussion Starter · #15 ·
dj norm;2327273 Just my opinion and you have nothing to loose said:
Norm. I sent the pictures to Dunlop who weren't really interested at all in any possible defects their tyres may have. They dribbled on about their complex system for returning tyres and how little, if any, help they would give towards a replacement even for a tyre within their 5 year warranty which this one is.
I told them I have already brought a replacement E3 and that wasn't the point... the point is safety. One can only try! :?
Maybe Bridgestones next time?
 

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Wow sad story somtime there is a rep going store to store u might wanna talk with that guy next time they are the one doing what is called tire ajustment but even then in this case the 5 years could hit you back :-(
 

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How much air pressure do you run in your tires John. Maybe I`m just lucky, but I have never had a Dunlop tire that was bad in 40 years of riding.
gumbyred
 

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Discussion Starter · #18 ·
How much air pressure do you run in your tires John. Maybe I`m just lucky, but I have never had a Dunlop tire that was bad in 40 years of riding.
gumbyred
I took the advice of many on this site and run at 40psi. Dunlop are generally good and I've used them for years too. I'm not overly bothered by having a bad one but thought others should know in case there is an inherent fault with some E3's. Dunlop's lack of intetest was disappointing though.
 

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It aint rocket science
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Any one who truly believes they have a defective tire with no resolution from the manufacturer and is in the U.S. should file a complaint with the NHTSA.

They wont sweep it under the carpet. The squeaky wheel gets the grease.
 
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