Removable valve cores??

William Jenks

 In a thread on tires and tubes, Matt Ancona wrote:

"I now use Challenge Latex tubes as they have removable valve cores.  I like this much more than the michelin tubes with zipp style extenders [link added]"

Dopey question... what's the deal with "removable valve cores"?  How does this have to do with the valve extender issue?  What part gets removed?  etc etc.  What parts do you need instead of a valve extender or what kind of valve extender do you need?

(I hate dealing with extenders, too and would love to have a good work-around.  We have both a set of 404s and a Hed jet.  Those 404s are awfully picky about what fits through the stem hole and how tight it's sealed.)

Thanks!

bconway6650

Removeable valve cores allow you to "upgrade" from the plain, simple aluminum tube type extender thats that are supplied by most wheel manufacturers to a true extender that places the "screw down" valve lock at the top of the extender just like the plain inner tubes you're used to.
Tufo and some other manufacturers offer extenders that allow you to remove the valve core from your tube and install it in the extender, from there you simply install the extender to your tube and you are ready to go.
If needed, you can stack the extenders to make any length needed for your wheel.

I hope this helps.

mancona

I would insert a picture but I can't figure out how in this response, so here is a link:

http://t0.gstatic.com/images?q=tbn:...S3oDKxgmmQ

Basically you use a specific tool (or needle nose pilers) and you can remove the valve from the stem on the tube.  Then you screw on an extender that has a o-ring seal and then screw the valve core into the extender.

This simply makes the value stem longer and moves the core so it is outside of the deep rim.

It really is much easier than it sounds.

The reasons i like it more is I can screw the valve closed, I can easily let air out, and they stay tight and do not leak.

mancona

Here is another picture that will show how this works:

http://t1.gstatic.com/images?q=tbn:ANd9GcSp94yaQu_8nC0hNZpQ7y-phsRqDAYHgFkoN5pdIijPJ7vGWltOkQ

William Jenks

Yes, I actually have a Topeak extender that looks like this: http://www.topeak.com/products/Pumps/PrestaValveExtenderXL

Is that the kind of thing you're talking about? You actually remove the little screw-in bit in the middle of the stem?

That's not exactly like the pictures here from Tufo: http://www.tufonorthamerica.com/accessories.php

Sorry for being such a dope on this!

William Jenks

@mancona... ok, I see your response and mine crossed in the ether. That looks a lot more like the TUFO picture than the Topeak one.



This link from Zipp is apparently using a "normal" one, not what you're talking about from what I can see: http://www.youtube.com/watch?v=S9YLlZDIOkU



Is this the Tufo extender? When you take the core out, it comes out nicely and you just screw it into the end of the extender? Is that right? (Edit...forgot the lnk)

http://www.competitivecyclist.com/za/CCY?PAGE=BUY_PRODUCT_STANDARD&PRODUCT.ID=3313&MODE=

Again, thanks.