Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 12-27-10, 03:37 PM   #1
Jed19 
Senior Member
Thread Starter
 
Jed19's Avatar
 
Join Date: Oct 2004
Bikes:
Posts: 4,228
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Removable Presta Valve Cores

I have two Continental Presta tubes whose removable valve cores were blown to bits by my Lezyne screw-on pump chuck. I do not want to throw these tubes away, and I am about to spend about $12 on a 10-pack Vittoria removable presta valve core card.

My question is: Will the Vittoria removable presta heads fit my Continental tubes?

I am thinking they should.

Thanks.
__________________
Regards,

Jed
Jed19 is offline   Reply With Quote
Old 12-27-10, 04:11 PM   #2
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Posts: 29,421
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 92 Post(s)
IMO the best option for Presta pump heads is the push on style w/o thumb lock which use a conical washer and are held onto the valve by air pressure. For these to work well, they need a pressure bleed valve to empty the hose when finished so the head can be pulled off easily. Years ago, we used to modify Silca and other heads to add the bleed valve, but now some companies like Topeak and Blackburn have them designed in.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is offline   Reply With Quote
Old 12-27-10, 04:22 PM   #3
Jed19 
Senior Member
Thread Starter
 
Jed19's Avatar
 
Join Date: Oct 2004
Bikes:
Posts: 4,228
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
^Thanks. I do like my Lezyne pump. It is the removable valve core tubes that Probikekit sent me that are the issue at hand.

Back to the original question, are the valve cores standardised?
__________________
Regards,

Jed
Jed19 is offline   Reply With Quote
Old 12-27-10, 04:25 PM   #4
TLCFORBIKES
Senior Member
 
TLCFORBIKES's Avatar
 
Join Date: Feb 2010
Location: Raleigh NC
Bikes: 1983 Gureciotti/full SR 2002 Casati Record 10 speed 1995 Colnago C40 2007 Sram Rival 2006 Isaac Sram Force 2000 DEAN Ti DA 10 speed 1987 Schwinn Prologue Funny Bike 2001 Pinarello DA 9 speed 2008 Element6 Record 10speed Origin8 Lutegra10speed
Posts: 324
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The Vittoria valve cores will work on your Continental tubes. Presta valve core are pretty much interchangable.
TLCFORBIKES is offline   Reply With Quote
Old 12-27-10, 05:14 PM   #5
Jed19 
Senior Member
Thread Starter
 
Jed19's Avatar
 
Join Date: Oct 2004
Bikes:
Posts: 4,228
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by TLCFORBIKES View Post
The Vittoria valve cores will work on your Continental tubes. Presta valve core are pretty much interchangable.
Thanks!
__________________
Regards,

Jed
Jed19 is offline   Reply With Quote
Old 12-27-10, 05:47 PM   #6
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Jed19 View Post
^Thanks. I do like my Lezyne pump. It is the removable valve core tubes that Probikekit sent me that are the issue at hand.

Back to the original question, are the valve cores standardised?
If by obliterated you mean, they came undone - you can screw them back on you know.
operator is offline   Reply With Quote
Old 12-27-10, 05:52 PM   #7
Jed19 
Senior Member
Thread Starter
 
Jed19's Avatar
 
Join Date: Oct 2004
Bikes:
Posts: 4,228
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by operator View Post
If by obliterated you mean, they came undone - you can screw them back on you know.
No, they were obliterated. The littlle knurl atop the valve was torn off the valve.

By the way, any tips re safely using Lezyne floor pumps on removable valve cored tubes? I recall reading that you use Lezyne pumps in your shop. No?

It is when the chuck is unscrewed from the valve that the core comes off with the chuck.
__________________
Regards,

Jed
Jed19 is offline   Reply With Quote
Old 12-27-10, 05:52 PM   #8
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 18,841
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 223 Post(s)
might be a good use of threadlock.. removable core PV tubes are becoming more common
with deep section V wheels needing extensions.
so then you screw the extension in and put the valve core on top.
2 places to lose air by stem parts unscrewing..

Last edited by fietsbob; 12-27-10 at 05:56 PM.
fietsbob is offline   Reply With Quote
Old 12-27-10, 05:53 PM   #9
Al1943
Senior Member
 
Join Date: Feb 2005
Location: Oklahoma
Bikes: Trek 5500, Colnago C-50
Posts: 9,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I'm wondering why you want removable cores. Aren't they heavier?
Al1943 is offline   Reply With Quote
Old 12-27-10, 05:58 PM   #10
Jed19 
Senior Member
Thread Starter
 
Jed19's Avatar
 
Join Date: Oct 2004
Bikes:
Posts: 4,228
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Al1943 View Post
I'm wondering why you want removable cores. Aren't they heavier?
I did not "want" them. It was what was shipped to me by Probikekit. Of course, they did not put on their order catalogue that the valve cores were removable.
__________________
Regards,

Jed
Jed19 is offline   Reply With Quote
Old 12-27-10, 06:00 PM   #11
Jed19 
Senior Member
Thread Starter
 
Jed19's Avatar
 
Join Date: Oct 2004
Bikes:
Posts: 4,228
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by fietsbob View Post
might be a good use of threadlock.. removable core PV tubes are becoming more common
with deep section V wheels needing extensions.
so then you screw the extension in and put the valve core on top.
2 places to lose air by stem parts unscrewing..
Very nice notion. Which threadlock would you recommend? Loctite Blue?
__________________
Regards,

Jed
Jed19 is offline   Reply With Quote
Old 12-27-10, 06:17 PM   #12
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Jed19 View Post
No, they were obliterated. The littlle knurl atop the valve was torn off the valve.

By the way, any tips re safely using Lezyne floor pumps on removable valve cored tubes? I recall reading that you use Lezyne pumps in your shop. No?

It is when the chuck is unscrewed from the valve that the core comes off with the chuck.
Yes we use them all the time. Almost all of our tubes are removeable core - the advantage is that you can screw on for example, extenders of various lengths then reattach the core at the top. These are much better than the standard cheaper tube extender type.

We have a plastic tool - and stans also makes a metal version, of the core removal/tightening tool. Alternatively you can also use pliers/small crescent to do this. When connecting the head onto the valve, make sure the hose isn't trying to pull it sideways, that's when you run into problems.
operator is offline   Reply With Quote
Old 12-27-10, 06:18 PM   #13
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Al1943 View Post
I'm wondering why you want removable cores. Aren't they heavier?
It allows you to use extenders, for deep dish wheels. The tubes no longer have to come in 30 different valve lengths - you just buy the appropriate length extender for each wheel you have.
operator is offline   Reply With Quote
Old 12-27-10, 06:19 PM   #14
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Jed19 View Post
Very nice notion. Which threadlock would you recommend? Loctite Blue?
You don't need loctite. Just tighten the valve normally. You can use teflon tape if you need extra resistance to removal.
operator is offline   Reply With Quote
Old 12-27-10, 06:38 PM   #15
Chini563
Senior Member
 
Chini563's Avatar
 
Join Date: Jun 2009
Bikes: Bianchi B4P Mono Q
Posts: 244
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Buy new tubes and take care of how you handle them they are fragile
Chini563 is offline   Reply With Quote
Old 12-27-10, 07:03 PM   #16
Jed19 
Senior Member
Thread Starter
 
Jed19's Avatar
 
Join Date: Oct 2004
Bikes:
Posts: 4,228
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by operator View Post
It allows you to use extenders, for deep dish wheels. The tubes no longer have to come in 30 different valve lengths - you just buy the appropriate length extender for each wheel you have.
Especially if you are running multiple wheelsets like I do. My backup to my 62mm valve tubes for my 50mm aero wheels are 30mm Vittoria valve extenders. If I can only master the art of using my Lezyne pump with removable valve core tubes, I'll be on top of the world!

It means I can just buy regular 42mm stem length presta valve tubes for all my wheelsets.
__________________
Regards,

Jed
Jed19 is offline   Reply With Quote
Old 12-27-10, 07:19 PM   #17
byte_speed
Roadkill
 
byte_speed's Avatar
 
Join Date: Sep 2004
Location: East Tennessee
Bikes: 2002 Lightspeed Classic; 2010 Pedalforce RS
Posts: 857
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by FBinNY View Post
IMO the best option for Presta pump heads is the push on style w/o thumb lock which use a conical washer and are held onto the valve by air pressure. For these to work well, they need a pressure bleed valve to empty the hose when finished so the head can be pulled off easily. Years ago, we used to modify Silca and other heads to add the bleed valve, but now some companies like Topeak and Blackburn have them designed in.
Now that is some good info. I always wondered why my Silca was so hard to remove. Thanks.
byte_speed is offline   Reply With Quote
Old 12-27-10, 09:15 PM   #18
Al1943
Senior Member
 
Join Date: Feb 2005
Location: Oklahoma
Bikes: Trek 5500, Colnago C-50
Posts: 9,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by operator View Post
It allows you to use extenders, for deep dish wheels. The tubes no longer have to come in 30 different valve lengths - you just buy the appropriate length extender for each wheel you have.
Makes sense, thanks.
Al1943 is offline   Reply With Quote
Old 12-27-10, 09:17 PM   #19
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 18,841
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 223 Post(s)
I Note There is an Unthreaded portion of presta stems, that is where the air seal gasket grips.

its between the smaller coarse thread on the end, and the larger finer thread for the ring nut.

then You can pull the air chuck off. with little effort.

If you shove it up on the fine threaded part of the stem,
you are just making work for yourself that is counterproductive.

as is a screw on pump head on a removable valve stem ,
as unscrewing one will unscrew the other, a push on/ pull off pump head
is so much more sensible..

Last edited by fietsbob; 12-27-10 at 09:20 PM.
fietsbob is offline   Reply With Quote
Old 12-28-10, 02:42 AM   #20
dddd
Ride, Wrench, Swap, Race
 
dddd's Avatar
 
Join Date: Jan 2010
Location: Northern California
Bikes: Cheltenham-Pederson racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
Posts: 5,069
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yeah, helluva good point about where the chuck should seal.
Once the user forces the chuck up on to the bigger portion, the seal may get stretched and/or reamed to a bigger size, then sealing is poor and one may HAVE to push it on further the next time to effect a good seal.
I always push a Presta chuck only fully onto the smaller-threaded end-portion, and they last almost forever and never come off from pressure.

I had an issue with the removeable cores on my sewups. I carry an SKS Sub-40 pocket pump and the small head on this one won't seal AT ALL with the wrench flats on the valve. I had to borrow a pump from a passing rider!

BTW, the SKS 40-gram pump has lasted over two years now. It still takes about 250 strokes to get a 23mm tire up to a minimal riding pressure of 80psi or so. It's so light that I have to rubber-band it to my spare 67-gram tube or it will fly out of my jersey pocket!
dddd is offline   Reply With Quote
Old 12-28-10, 03:06 AM   #21
Kimmo
bike whisperer
 
Kimmo's Avatar
 
Join Date: Dec 2009
Location: Melbourne, Oz
Bikes: copy/paste links: http://velospace.org/node/36949 http://velospace.org/node/47746 http://velospace.org/node/47747
Posts: 7,099
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by FBinNY View Post
IMO the best option for Presta pump heads is the push on style w/o thumb lock which use a conical washer and are held onto the valve by air pressure. For these to work well, they need a pressure bleed valve to empty the hose when finished so the head can be pulled off easily. Years ago, we used to modify Silca and other heads to add the bleed valve, but now some companies like Topeak and Blackburn have them designed in.
I have a setup I prefer - my pump has a brass Shrader head on it for some reason, so I use a brass adapter that has an o-ring that seals nicely on the valve when it's screwed on. This stays screwed into the pump head, which has a rubber washer the adapter beds into. You have to unscrew the valve a bit hard so it doesn't get tightened up when you screw the pump head on, but the Presta threads are nice and quick, so it's not much of an extra hassle.

I don't mind the little bit of extra effort required, cause I'm assured no leaks or valve damage.
Kimmo is offline   Reply With Quote
Old 12-29-10, 01:20 PM   #22
Jed19 
Senior Member
Thread Starter
 
Jed19's Avatar
 
Join Date: Oct 2004
Bikes:
Posts: 4,228
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Kimmo View Post
I have a setup I prefer - my pump has a brass Shrader head on it for some reason, so I use a brass adapter that has an o-ring that seals nicely on the valve when it's screwed on. This stays screwed into the pump head, which has a rubber washer the adapter beds into. You have to unscrew the valve a bit hard so it doesn't get tightened up when you screw the pump head on, but the Presta threads are nice and quick, so it's not much of an extra hassle.

I don't mind the little bit of extra effort required, cause I'm assured no leaks or valve damage.
Cool! For the purposes of whoever use search to find a solution to a similar problem, here goes.

I just flip my Lezyne chuck to Schrader, screw on a Schrader adapter to my removable valve core and pump away. No issues. And cheap too, as the adapter is only $1.
__________________
Regards,

Jed
Jed19 is offline   Reply With Quote
Old 12-29-10, 04:49 PM   #23
Bezalel
Senior Member
 
Join Date: Mar 2010
Location: City of Brotherly Love
Bikes: Raleigh Companion, Nashbar Touring, Novara DiVano, Trek FX 7.1, Giant Upland
Posts: 1,508
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Jed19 View Post
Very nice notion. Which threadlock would you recommend? Loctite Blue?
I just tighten them with a wrench. If you want to use a threadlocker than use Loctite Purple.
Bezalel is offline   Reply With Quote
Old 12-30-10, 09:45 AM   #24
davidad
Senior Member
 
Join Date: Feb 2009
Bikes:
Posts: 4,833
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Quote:
Originally Posted by Al1943 View Post
I'm wondering why you want removable cores. Aren't they heavier?
You are joking, aren't you?
davidad is offline   Reply With Quote
Old 05-30-15, 09:01 PM   #25
dglevy
Dopamine Junkie
 
dglevy's Avatar
 
Join Date: Apr 2006
Location: Washington DC area
Bikes: (1) Giant TCR racing bike, Ultegra/DuraAce groupo. (2) Kastle TT bike, Ultegra groupo.
Posts: 158
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Quote:
Originally Posted by TLCFORBIKES View Post
The Vittoria valve cores will work on your Continental tubes. Presta valve core are pretty much interchangeable.
Thanks for the thread and the information. I figured I'd revive this thread since it proved so helpful and it should stay on the search engine radar. Sometimes the Internet is wonderful... I bought a ten-pack of Kenda valve cores, thanks to your advice, and installed one of them in my Continental tube. Worked like a charm!

Now that I've got a ten-pack, I'm more inclined to stick with Conti tubes--or other makers who have removable cores, since I've now broken two lock nuts off in the past 5 years or so. I did some reading of old threads comparing the quality of various tubes. There's no full consensus, of course, but Contis seem to have a good reputation. I've had two or three tubes fail, in the past two years or so, at the valve stem, where the valve meets the tube. i was thinking it was b/c I was over-tightening the 'jam nut' that holds the stem, but it might be just faulty manufacture. So maybe the Contis--or other higher quality tubes that also have removable cores--will hold up better.

Last edited by dglevy; 05-30-15 at 09:07 PM.
dglevy is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 01:55 AM.