tubeless valve leaking air

[Tania]

I noticed this weekend that the spin-ny twisty top thing on my presta value was sticky – meaning, I had trouble opening it and then closing it once I was done adding some air. Now I can neither open it nor close it and it’s stuck in a half open position and slowly leaking air. At least, I’m fairly sure that the air is coming from the valve.

Is that fixable (and if so, how?) or should I just use a new valve stem?

Topic

[hozn]

@mstone 167570 wrote:

I wonder what the average number of installed spokes is before someone throws the whole thing out a window.

This is exactly why I’ve never even considered building one of these I think for me it would be 1, maybe 2.

(Tape is so easy to install and adds negligible weight, so I’ll always choose that option rather than a wheel that is a pain to build or, heaven forbid, repair.)

[drevil]

@hozn 167573 wrote:

This is exactly why I’ve never even considered building one of these I think for me it would be 1, maybe 2.

(Tape is so easy to install and adds negligible weight, so I’ll always choose that option rather than a wheel that is a pain to build or, heaven forbid, repair.)

I wonder if you could do the same thing as in this video (at 2:46):
[video=youtube_share;rAw7ihWIgAk]https://youtu.be/rAw7ihWIgAk?t=2m46s[/video]

[hozn]

@drevil 167576 wrote:

I wonder if you could do the same thing as in this video (at 2:46):
[video=youtube_share;rAw7ihWIgAk]https://youtu.be/rAw7ihWIgAk?t=2m46s[/video]

I think you can, yeah. That video does make it look easy. Probably the second time I accidentally lost the nipple in there after removing the magnet I’d be kicking myself, though.

[Raymo853]

@hozn 166259 wrote:

Otherwise forget using a thread-on Lezyne pump head.

(Honestly, I have never understood why people go through the hassle of putting in sealant through the valve stem.)

Lezyne has a new design hose that no longer backs out valves. It is compatability with all the older pumps.

I put sealant through valve stems every month in every tire. Why? Some tires are so hard to seat and sealant dries up in a few weeks.

Sent from my SM-G900V using Tapatalk

[hozn]

@Raymo853 167912 wrote:

Lezyne has a new design hose that no longer backs out valves. It is compatability with all the older pumps.

I put sealant through valve stems every month in every tire. Why? Some tires are so hard to seat and sealant dries up in a few weeks.

On their portable/hand pumps? I’ve tried a few Lezyne heads on floor pumps; the more traditional double-barelled head actually works well, but their other push on or “half-twist” heads worked terribly for me.

I use the Silca push-on head on my Lezyne dirt drive now.

For me sealant lasts closer to a few months, though it probably depends on a number of factors (?)

[Author]

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