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tubes with unthreaded presta valves

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tubes with unthreaded presta valves

Old 06-25-05, 06:30 PM
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tubes with unthreaded presta valves

Michelin makes them. Any others? thx
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Old 06-25-05, 06:41 PM
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what's the deal with unthreaded prestas? Are there any pics of one I can see?
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Old 06-25-05, 06:44 PM
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They're easier on your pump seals..

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Old 06-25-05, 06:45 PM
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I just did a quick google, apparently hutchinson makes some too.
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Old 06-25-05, 06:46 PM
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I have Michelins and they're unthreaded.. my spare is a Specialized Turbo, which is threaded.
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Old 06-25-05, 06:54 PM
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Originally Posted by catatonic
I just did a quick google, apparently hutchinson makes some too.
Sure enough. How did I miss that? Thing about Michelins is they size them 700x18-23 or 700x25-32. The latter is what I would need but they're heavier.

Hutchinson sells a lighter 700x18-25 butyl tube. Perfect!! Thanks cat!

Any others?
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Old 06-25-05, 06:55 PM
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Giant tubes are unthreaded. They are plain silver. Not sure who makes them though
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Old 06-25-05, 06:58 PM
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Torrelli and Vittoria have some w/o threads....
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Old 06-25-05, 07:21 PM
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Yea but how does the nut stay on if there are no threads?
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Old 06-25-05, 07:26 PM
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Originally Posted by Grasschopper
Yea but how does the nut stay on if there are no threads?
No nut... I bought performance tubes and they had unthreaded valves with thread just enough to fit hold your pump head...
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Old 06-25-05, 07:28 PM
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Originally Posted by Grasschopper
Yea but how does the nut stay on if there are no threads?
My valvestems are unthreaded and I have no problem staying on the bike.
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Old 06-25-05, 07:37 PM
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Originally Posted by khuon
My valvestems are unthreaded and I have no problem staying on the bike.
At least someone got it....
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Old 06-25-05, 09:35 PM
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Originally Posted by Grasschopper
At least someone got it....
Got it. Liked it.
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Old 06-26-05, 01:52 AM
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I have some unthreaded tubes by Kenda. I think they're prettier and easier to pump.
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Old 06-26-05, 02:02 AM
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Originally Posted by 661
They're easier on your pump seals..

Heh...valve envy...
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Old 06-26-05, 02:57 AM
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Originally Posted by bkrownd
Heh...valve envy...
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Old 07-07-05, 10:06 PM
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Originally Posted by 661
Michelin makes them. Any others? thx
Giant makes them, as another has mentioned. I've been using Giant "part 87639", 700x18-23C tubes which have 48mm silver-colored stems. They come with black-colored valve caps.

I've run through my stock of the Giants, so I've been trolling the local shops recently hoping to find something unthreaded. One store said that they used to stock such tubes, but quit because folks didn't buy them much. Of the stores I found which carried Giant tubes, none had any in 700x23C.

I finally picked up some Michelin "Airstop Butyl A1" tubes, which have brass-colored 52mm valve stems (wow they're long) and black plastic covers. The stems aren't threaded, although they do have three grooves cut into the stem near the valve end; I guess they couldn't let our pumps off totally scott-free.

I'll still keep an eye out for the Giant ones, though; <pose>silver matches my bike better.</pose>

-JAB
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Old 07-07-05, 10:10 PM
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Originally Posted by jab
Giant makes them, as another has mentioned. I've been using Giant "part 87639", 700x18-23C tubes which have 48mm silver-colored stems. They come with black-colored valve caps.

I've run through my stock of the Giants, so I've been trolling the local shops recently hoping to find something unthreaded. One store said that they used to stock such tubes, but quit because folks didn't buy them much. Of the stores I found which carried Giant tubes, none had any in 700x23C.

I finally picked up some Michelin "Airstop Butyl A1" tubes, which have brass-colored 52mm valve stems (wow they're long) and black plastic covers. The stems aren't threaded, although they do have three grooves cut into the stem near the valve end; I guess they couldn't let our pumps off totally scott-free.

I'll still keep an eye out for the Giant ones, though; <pose>silver matches my bike better.</pose>

-JAB
I use the Airstop A1's and the 3 grooves aren't really threads, they're just regular concentric grooves... I would assume they're to provide some grip for the pump seals? I doubt they really do any good and they're covered up by the cap when you have it on.
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Old 07-07-05, 11:03 PM
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Come to think of it, why are Presta stems threaded in the first place? Unthreaded makes a lot more sense. I suppose they cost 3 or 4 times as much as regular tubes to boost the OCP factor
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Old 07-07-05, 11:06 PM
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?! for real?! I have a giant threadless, and I got it for $6, no more than I'd pay for a tube normally.
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Old 07-07-05, 11:12 PM
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Originally Posted by PenguinDeD
?! for real?! I have a giant threadless, and I got it for $6, no more than I'd pay for a tube normally.
Well that's at least 2x as much as I pay for a tube normally. So I'm off a little
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Old 07-07-05, 11:16 PM
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My bontragers have unthreaded valves. for about $10AU, dont know how good they are.

Dont mean to hijack a thread, but, I puncture repaired my tube over a month ago and am still riding metric centuries on it, should I change the tube or is this OK?
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Old 07-07-05, 11:19 PM
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Originally Posted by gabdy
Dont mean to hijack a thread, but, I puncture repaired my tube over a month ago and am still riding metric centuries on it, should I change the tube or is this OK?
A properly patched tube can be stronger at the point of puncture than it was to begin with. I've ridden thousands of miles on patched tubes without problems. I've never had a patched tube fail on me at the patch. Then again, I don't use glueless patches. I've heard those things don't last.
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Old 07-07-05, 11:28 PM
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specialized does too
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Old 07-08-05, 12:11 AM
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Originally Posted by nitropowered
Giant tubes are unthreaded. They are plain silver. Not sure who makes them though
I just checked mine; they say "KENDA" on the tubes themselves.

Originally Posted by Smoothie104
specialized does too
The Specialized tubes I've encountered in my recent search have all had threaded stems. I didn't note which models they were, though.

-JAB
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