Pump breaks off nut on Presta valves
08-05-19, 10:06 AM
#26
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Quite a few reviewers on Amazon echo your problems,
and say that you should get another pump.
https://www.amazon.com/Park-Tool-Hom...ustomerReviews
and say that you should get another pump.
https://www.amazon.com/Park-Tool-Hom...ustomerReviews
Last edited by woodcraft; 08-05-19 at 10:10 AM.
08-06-19, 07:13 PM
#27
Junior Member
For all of 50+ years dealing with tires (bike,wagon, auto..etc) I have never had an issue with a Schrader. Only recently have I started to collect bikes with presta valves and I've hade trouble adapting to them from the beginning. Just to be able to fill a tire anywhere is a pain. I've had to find adapters, try this pump or that pump.
Recently I just had the tip of the core break off too. I had barely ridden this bike and now I had to buy a new tube just because the core was not replaceable.
To have to go through a whole tube replacement for something I never worried about in the past really takes the fun out of riding.
Recently I just had the tip of the core break off too. I had barely ridden this bike and now I had to buy a new tube just because the core was not replaceable.
To have to go through a whole tube replacement for something I never worried about in the past really takes the fun out of riding.
08-06-19, 07:20 PM
#28
Banned.
This is why I got in the habit years ago of using a schrader adapter. The presta's aren't as much of a problem when using a floor pump at home, but out on the road, pumping up a tire with my Silca frame pump, that you just can't stabilize like a floor pump, that's where I had this problem. The screw-on schrader adapters protect the fragile presta stem, and since using them routinely, I don't think I've even bent a presta stem, much less broken another one.
08-07-19, 05:08 AM
#30
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Some brands of tubes' valves are flimsier than others. I've pretty much settled on using Michelin tubes.. I like the smooth valve stems made out of brass. This smooth (unthreaded) valve stem seems to make pump heads easier to release, and the brass material seems quite a bit more robust than eg. whatever Conti uses.
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08-07-19, 11:16 AM
#31
Senior Member
and I thought I was the only one who worried about this -- appreciate reading this thread
08-08-19, 03:55 PM
#32
Senior Member
I find this interesting. I have broken off the nut on a presta valve, and have continued to use the tube. Why are you unable to use the tube? The nut does not create a seal, it only reinforces it, so to speak. I know lots of people with deep dish wheels that use valve extenders and keep the nut unscrewed so they don have to remove and replace the valve extender each time they pump up the tire. The extenders do not have a check valve in them.
08-09-19, 03:00 PM
#33
Junior Member
I find this interesting. I have broken off the nut on a presta valve, and have continued to use the tube. Why are you unable to use the tube? The nut does not create a seal, it only reinforces it, so to speak. I know lots of people with deep dish wheels that use valve extenders and keep the nut unscrewed so they don have to remove and replace the valve extender each time they pump up the tire. The extenders do not have a check valve in them.
Am I correct that thinking that you just leave the valve open with the schader adapter and leave it on the presta valve?
08-09-19, 04:00 PM
#34
Senior Member
".. but it still held air! I guess it functions just like a schrader after that?"
The function is the same, yes, but the only spring that closes the valve is the actual air pressure in the tube. A Schrader valve has a coil spring in the valve that closes it, plus the air pressure in the tube. The coil spring in the Schrader valve makes it useful for low pressure applications.
I have seen only twice where the missing nut on a valve prevented it from staying put and the stem falls into the tube. Not sure if more than the nut and stem were damaged on those two tubes.
The function is the same, yes, but the only spring that closes the valve is the actual air pressure in the tube. A Schrader valve has a coil spring in the valve that closes it, plus the air pressure in the tube. The coil spring in the Schrader valve makes it useful for low pressure applications.
I have seen only twice where the missing nut on a valve prevented it from staying put and the stem falls into the tube. Not sure if more than the nut and stem were damaged on those two tubes.
