Conti GP4000SII tires have 'holes'?
03-10-18, 06:18 PM
#1
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Conti GP4000SII tires have 'holes'?
I've put some 80 miles on these tires and was checking if there is some small rock or anything stuck on the tire.
Nothing found
.
But, I see these 2 'holes' on my front and back tires - very close each other.
What are those? Bad tire?
I bought them from Ribble in January when started buying parts for my rebuild.
The zoom is from rear tire.
Nothing found
.But, I see these 2 'holes' on my front and back tires - very close each other.
What are those? Bad tire?
I bought them from Ribble in January when started buying parts for my rebuild.
The zoom is from rear tire.
03-10-18, 06:24 PM
#2
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I've seen those in all the GP4000 I've bought for the last several years. No problems for me. Something from the molding process most likely.
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Last edited by RonH; 03-10-18 at 06:31 PM.
03-10-18, 06:28 PM
#4
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Ah! Thank you so much - so it is by design.
But somehow seems a weak spot if you have luck (unluck) to get some rock or glass in it.
But somehow seems a weak spot if you have luck (unluck) to get some rock or glass in it.
03-10-18, 10:06 PM
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Originally Posted by phtomita
Ah! Thank you so much - so it is by design.
But somehow seems a weak spot if you have luck (unluck) to get some rock or glass in it.
But somehow seems a weak spot if you have luck (unluck) to get some rock or glass in it.
They are wear indicators.
03-11-18, 02:20 AM
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Originally Posted by phtomita
Ah! Thank you so much - so it is by design.
But somehow seems a weak spot if you have luck (unluck) to get some rock or glass in it.
But somehow seems a weak spot if you have luck (unluck) to get some rock or glass in it.
One cut in 500 miles, from a bit of embedded broken glass, and that happened Saturday morning. No problems with the wear indicator holes.
The only Continental tires I ride that do pick up pebbles and bits of debris are Speed Rides on my hybrid. Great tires, highly recommended for dry mixed terrain and pavement. But the file tread does pick up small pebbles. So far the pebbles haven't caused flats -- those came from broken glass. The file tread is its own wear indicator, no need for the holes in the slick road tires.
03-11-18, 07:33 AM
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03-11-18, 09:14 AM
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Since I have a phobia about using worn out tires I find these tread wear indicators a great confidence builder. Also I can run these longer knowing that they still have safe tread left.
03-11-18, 10:21 AM
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If you use folding tires, when the wear indicators are worn through there is still some mileage left on those tires. This is a good time to use such tires as emergency spares. At that point, they don't weigh much; mabe 200 grams.
03-11-18, 10:29 AM
#12
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I use the visible carcass threads as a wear indicator.
03-11-18, 05:59 PM
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Originally Posted by phtomita
Ah! Thank you so much - so it is by design.
But somehow seems a weak spot if you have luck (unluck) to get some rock or glass in it.
But somehow seems a weak spot if you have luck (unluck) to get some rock or glass in it.
03-11-18, 06:43 PM
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Originally Posted by SquidPuppet
I use the visible carcass threads as a wear indicator.
On a high quality tire with cotton casing one can see small cotton fibers peek through the rubber just prior to seeing the actual threads. It is my experience that flats are soon to follow and the tires are done.
-Tim-
03-11-18, 06:46 PM
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Originally Posted by SquidPuppet
I use the visible carcass threads as a wear indicator.
03-11-18, 10:05 PM
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Thank you all!!
That's why I love this forum - I learned more about bike in these 2 months than whole my life
That's why I love this forum - I learned more about bike in these 2 months than whole my life
03-13-18, 06:30 PM
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Originally Posted by Camo1976
When the hole gone the tire is done
400 miles later:
Last edited by Drew Eckhardt; 03-13-18 at 06:42 PM.
03-13-18, 06:55 PM
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They are suction cups for added grip. ����
03-13-18, 07:58 PM
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Originally Posted by Drew Eckhardt
I've found that at that point they still have 200-400 miles left before carcass threads start to show.
400 miles later:
400 miles later:
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Two wheels good. Four wheels bad.
03-13-18, 08:10 PM
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03-15-18, 03:57 AM
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TBH I've never had those GP4KSII's last long enough to wear through the "wear indicators". Either a sidewall tear or some other failure which is why I don't do conti any more.
scott s.
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scott s.
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