Valve Extender Issue
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1004 days
PJT posted 7 weeks ago.
Assuming you're using the correct side of the pump head, did you try teflon taping the threads?
For the record, I have never gotten that type of valve extener to work well. I greatly prefer using a tube with a removable core and installing the core at the end of the valve extender.
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trimas posted 7 weeks ago.
You have to use plumber's tape ( the white teflon stuff PJT mentioned.) Zipp says to use this in their instructions for their valve extensions.
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115 days
CadenceGuy posted 7 weeks ago.
I had the same problem last year. I use the Zipp valve extenders and even after using the tape I was still losing pressure to quickly or wasnt getting air at all. I found that when I was fussing with the pump trying to get it on the valve I was actually unscrewing the extender maybe a quarter/half turn. I can get mine inflated first time every time and lose no air pressure now. Just a thought.....
IM BACK!!! Well kinda, have to give it six weeks..but its better then six months!
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130 days
ryanweeg posted 7 weeks ago.
teflon tape = a plumbers duct tape. But you have to use it with valve extenders and make sure they are on there tight!
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tsilcyc posted 7 weeks ago.
I didn't put them on, the bike shop did. But they were able to inflate them so it kind of makes me wonder. Guess I'm tearing off the wheels to see what they've done. I'll report back.
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TriSooner posted 7 weeks ago.
PJT wrote:
Assuming you're using the correct side of the pump head, did you try teflon taping the threads?For the record, I have never gotten that type of valve extener to work well. I greatly prefer using a tube with a removable core and installing the core at the end of the valve extender.
Winner winner chicken dinner for the most technical answer of the day. Sheldon Brown would be proud.
Ironman Germany, July 6, 2008
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jerallen posted 7 weeks ago.
Ditto on what trisooner said, i have the joe blow pump and it will not pump up with the valve extenders. I had my shop replace the core with a longer threading, it works like a charm now. Sucks you pay >1500 bucks and get such a cheap non-fuctional valve.
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tsilcyc posted 7 weeks ago.
It turns out the shop didn't put any Teflon tape on it. So I did. I can now pump up the tire but cannot get an accurate read of how much pressure is in it. I have two pumps, neither can give a good read. I should've popped the core out. I'll be tearing those tires off again.
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Riverbrady posted 5 weeks ago.
Not getting a read - did you put too much tape in there?
I've never had problems with extenders, as long as they're the metal ones. The plastic ones don't hold worth anything - it's too easy to twist over the threading and make a gap that'll leak under pump pressure.
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tsilcyc posted 5 weeks ago.
To follow up, I've had a bit of education since this issue.
There are three types of valve extenders (at that I've discovered).
1. A hollow tube which basically screws on to the end of the end of the valve on your tube.
2. A screw in core extension.
3. A valve which screws over the existing valve.
There are two different types of valves on tubes.
1. A standard valve.
2. A value with a removable core which has a flat spot on the threads for removal.
If you use extender #1 or #3 on tube #2, you might encounter the problem I had.
I finally opted for valve #3 with tube #1.
In all cases, it is advisable to use Teflon tape in order to get a good seal.
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PJT posted 5 weeks ago.
Very nice summation. For your chosen combo, make sure that the tube valve core is wide open when you install the extension (people say you can accidentally screw the valve shut when putting on the extension, but it might never have been open in the first place).
Final piece of advice--if you race with a blowout kit, prep your spare tubes by installing the extenders beforehand. You do not want to be messing with those things out on the race course.
I have the type of valve extender that is just a tube that screws on to the end of the valve. The valve extenders are on tight. The valve on the tube is open. I have verified this by poking it with a long wire and releasing air. I have a Joe Blow floor pump that will not inflate these tires but it will inflate others without valve extenders. When I attempt to inflate either tire, I hear the air escaping. Any thoughts before I rip off the tire?
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