Popping valve stems.
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Popping valve stems.
Postby kenwstr » Sat Feb 10, 2018 11:19 pm
So I have been repairing thorn punctures every week this season but have had 4 valves separate from the tube in as many months. The tubes are maybe 2 years old but thorn punctures have been exceptionally frequent this season. I run 100 psi in rear and 80 psi in front. The last one, I had just repaired the tube and inflated the tyre and was putting some things away so wheel was not on the bike yet and I hear it soft pop and whoosh goes the air. So off comes the tyre again and I check, it's popped the valve stem. Just a little hole right at the base of the valve stem which has clearly separated from the butyl. Now I swear, there are no sharp edges around the rim hole and the rim tape is correctly positioned, not blocking the hole. The butyl appears to be in good condition having always used talc. The pressure is checked regularly especially as they have had many pricks this season. Could it simply be age or is it more likely something I'm doing. They are all the same brand of light race tube but I don't want to identify the brand in case there are unfair assumptions made. However, is this a known issue with a particular brand.
Ken
- foo on patrol
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Re: Popping valve stems.
Postby foo on patrol » Sun Feb 11, 2018 6:57 am
Foo
Goal 6000km
- Tim
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Re: Popping valve stems.
Postby Tim » Sun Feb 11, 2018 7:41 am
Mostly cheap tubes supplied "free" with tyre purchases but also Continentals. Similar problem to OP but also unable to properly adhere a patch.
Since been buying dearer Schwalbe tubes. No problems.
I thought I might have been a bit rough attaching and removing the pump head but the problem ceased with better tubes.
- Ross
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Re: Popping valve stems.
Postby Ross » Sun Feb 11, 2018 8:45 am
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Re: Popping valve stems.
Postby twowheels » Sun Feb 11, 2018 12:36 pm
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Re: Popping valve stems.
Postby uart » Sun Feb 11, 2018 8:25 pm
Several times I've fixed punctures for people who have ridden like this, only to find that the base of the valve stem gives out when I go to reinstall the tube.
- Derny Driver
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Re: Popping valve stems.
Postby Derny Driver » Sun Feb 11, 2018 9:11 pm
Try a different brand.
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Re: Popping valve stems.
Postby 10speedsemiracer » Sun Feb 11, 2018 10:38 pm
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Re: Popping valve stems.
Postby kenwstr » Mon Feb 12, 2018 12:05 pm
Ken
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Re: Popping valve stems.
Postby jackthelad » Wed Feb 14, 2018 3:48 pm
I went Tubeless on my Ultegra 6800 wheels
Running Hutchision Fusion3, Schwable Pro one rear,
on the only road bike i own.
Tubeless to me is a known Quantity, and how it works and behaves..
I run it because with tubes, i kept getting fitment punctures, dues to having cerebral palsy
i could not fit the tyre well, with little muscle strength in one of my hands
i would suggest a tubeless conversion, if your wheels are not already tubeless compatable,
work very well around perth and the thorns here, see no reason, woud not work for you
SantaCruz Blur XC Carbon
Kona Kula Supreme(Retired/Spare)
Surly Karate Monkey
Ribble Rd Bike
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Re: Popping valve stems.
Postby kenwstr » Wed Feb 14, 2018 10:24 pm
Ken
- Duck!
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Re: Popping valve stems.
Postby Duck! » Thu Feb 15, 2018 12:06 am
Or plug it.
Or as a get home, then chuck the tyre if it's a bad hole solution, externally patch the tyre.
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Re: Popping valve stems.
Postby jackthelad » Thu Feb 15, 2018 11:43 pm
Carry a Tubekenwstr wrote:What do you when a tubeless gets a flat 50 km from town and no mobile reception?
Ken
or Tubeless tyre repair kit ..
SantaCruz Blur XC Carbon
Kona Kula Supreme(Retired/Spare)
Surly Karate Monkey
Ribble Rd Bike
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