RoadBikeReview.com's Forum Archives - Components


Archive Home >> Components(1 2 3 4 5 6 7 8 9 10 )


Inflating tires with valve extenders(12 posts)

Inflating tires with valve extenderssprocket rocket
Nov 21, 2002 11:30 AM
I got a new wheel set with 55mm rims so I have to use their valve extender. When I am pumping it up, my guage needle is jumping all over the place presumably from the extender leaking. I do not know if I have 100 or 200 psi in my tire. I am usualy pretty anal about tire pressure and check it with a hand gauge, but I cannot figure out how to check pressure on an extended valve.

Any suggestions?
get a better valve extenders, or get tubes with long stems (nm)Starliner
Nov 21, 2002 12:51 PM
Longer StemsChen2
Nov 21, 2002 12:53 PM
There are plenty of tubes available with longer stems. My LBS carries tubes with 60mm and 80mm stems. Performance has 60mm stem tubes. I'm not sure how these things are measured, I use 60mm stems on 57mm rims and there are more than 3mm sticking out. I can get a floor pump or CO2 to work fine.
~Al
re: from the Holy Book of Telfon Tape... chapter 6 verse 9Akirasho
Nov 21, 2002 1:20 PM
... yeah so ye shall seal the threads of a tube's valve upon which an extender is to be placed with thrice wrapped layers of teflon tape... taking care to make sure the valve core is fully open an unhindered by thou most versatile teflon... whereupon, not more than nor less than one drop of Blue Loctite will be applied to secure a valve extender to said tape... said valve... thus providing a leakless yet easily removed interface...

Amen.

We abide.

Remain In Light.

Be the bike.
You forgot the verses about the Holy Handgrinade of Antioch. NMeyebob
Nov 22, 2002 6:36 AM
HA!!! Shows how much YOU know!!!Akirasho
Nov 22, 2002 8:38 AM
... the Holy Handgrenade of Antioch may only be used against killer rabbitz!!!

We abide.

Remain In Light.

Be the bike.
Yeah, but when you flat and change tubes......Starliner
Nov 22, 2002 9:47 AM
... you'd better not forget to bring teflon tape and the loctite on the ride with you. Without them, chances are you'll be stuck in the boondocks.

When that happened to me, and after I was rescued, I tossed the extenders and replaced them with Vittoria extensions. With the Vittorias, you remove the valve core from your tube and reinstall it on the extension. The extension tightly screws down onto your tube without the need for tape or locktite. It's a very solid and sure fit - a Mercedes compared to a flimsy Daewoo.

You must have tubes/tubulars with removeable valve cores, however, but if you ever flat, you won't be monkeying around with extenders that need doctoring so you can get back home.
Yeah, but...Akirasho
Nov 22, 2002 6:06 PM
... the tape and Loctite are your "permanent" solution... a small sliver of teflon tape in your repair kit is easy, and you can save the Loctite for home...

I've experimented with removable valve cores and extenders that either accept them, or have their own cores... with mixed results (seems like more little things to go wrong)... I agree, that an extra long valve stem is the most ideal... but that just doesn't cover all the bases at the present time.

FWIW, I've rarely had any undue problems fixing extender equipped tubes on the road (generally, just patch as usual and reinflate (though measuring PSI can be difficult to impossible)... and in all fairness, my deep rims are generally race only...

We abide.

Remain In Light.

Be the bike.
Interesting, which tubes have removable cores???KurtVF
Nov 23, 2002 8:21 AM
My understanding is that most tubes do not have removable cores.
Here's one....Starliner
Nov 23, 2002 10:18 PM
My extenders are used for a set of tubulars. Here's one clincher tube that has a removeable core...

http://www.excelsports.com/new.asp?page=8&major=1&minor=31&description=Tube&vendorCode=CONTI
Extenders not goodEager Beagle
Nov 21, 2002 1:21 PM
I had no great success with them at all - the answer has to be long stems when the next opportunity arises.
sometimes necessary...Akirasho
Nov 21, 2002 2:15 PM
... my deepest rim section is 90mm... I've yet to find a tube with enuff extension to clear 'em.

We abide.

Remain In Light.

Be the bike.