Aside from being able to close the valve using this extender. What is the difference between the two valve extenders?
And
one comes with a wrench to screw it on tight?
Aside from being able to close the valve using this extender. What is the difference between the two valve extenders?
And
to install the first you remove the valve core, put in the extender, then put the valve core back in.
the second just goes on over the installed valve core, which you have to leave open since you no longer have access to the valve.
the first design is much better than the second and is how I’ll be setting up all my personal and shop demo/rental wheels this year.
question:
how do you remove a valve core
and how can you tell if your valve core is removeable?
When you say the first one is “better” can you qualify that a little? I can see it being better since a closed valve is much less likely to leak and you have easy access to it. But the second one seems like it may be easier to use in a hurry.
M~
When you say the first one is “better” can you qualify that a little? I can see it being better since a closed valve is much less likely to leak and you have easy access to it. But the second one seems like it may be easier to use in a hurry.
M~
You’re basically right about the benefits, also I’ve found the first kind seals better because of the thread quality on the extenders and the valves. Those external threads that version 2 goes onto are made for plastic caps, not airtight seals. Hence the teflon tape required.
With the valve core accessible you needn’t worry about being able to remove the extender so I loctite mine into the stem for a bombproof connection.
There is a third kind, that I have, but don’t know the brand.
it screws onto the external threads like #2 above, but also has a little gizmo that lets you open and close the valve.
it works pretty well, I even get away with no teflon tape, you just have to pump quick =)
The disadvantage of the one for which you need to remove your valve core is that you are then depending on having a perfect seal between the extender and the stem in order to keep air in your tire. With the other kind, if the seal is not quite perfect, you just lose a little air as you are putting it into the tire. Perhaps not a deal-breaker, but just make sure you do a really careful job sealing it.
question:
how do you remove a valve core
and how can you tell if your valve core is removeable?
Unthread it with the funny looking “A” tool (the hole in the tool fits over the valve core or use the open end for the valve extenders shown).
The top part will be a separate piece and have flats on it for the valve core tool.
Here is a picture of a removeable presta valve core and a presta valve core extender.
I have some of each kind…there are good points and bad points to each.
In general the relocated valve is better, because you can screw it closed. Teflon tape when you install it, and it’s good; just like using a regular stem. As somebody else said, though, you’re depending on a tight seal where it screws on; I have loosened mine with the pump head by accident before (lock pump head on, hose pulls it sideways, loosening the extender).
The simple extender kind work OK but I have had problems from time to time with the valve screwing closed, especially if you happen to accidentally loosen the valve with the pump as described above and then retighten it. Then if it’s a tubular, you’re stuck with either ripping it off and reglueing it, or unscrewing the extender and fishing around through the valve stem hole with a spoke or something to loosen the valve again. I’ve gotten pretty good at this. 