HOT: Active* forum members generally gain 5% discount at starbike.com store!
Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Articles FAQ Contact About




Post new topic Reply to topic  [ 6 posts ] 
Author Message
 Post subject: Valve lock on a tubie
PostPosted: Fri Mar 29, 2013 6:51 am 
Offline

Joined: Mon Dec 20, 2010 2:54 am
Posts: 49
Have a slight problem which I hope WW's can help with. I am using Vittoria CR tubies that do not have removable valve core or screw off at the tyre that allows for a complete valve extension change out to the right length. I thought that I had left the valve sufficiently screwed open when putting on the extension but over time( 3 months) it has worked its way closed meaning I cannot pump it up. Obviously I would prefer not having to rip it off and was wondering if there is some nifty way or securing the top of the valve through the extension that would allow me to screw it back open again.


Top
 Profile  
 
 Post subject: Valve lock on a tubie
Posted: Fri Mar 29, 2013 6:51 am 


Top
  
 
PostPosted: Fri Mar 29, 2013 11:42 am 
Offline

Joined: Fri Dec 24, 2010 9:37 pm
Posts: 537
Location: it's raining, it must be uk
if you can unscrew the extension it'll give you more space to work in

then use a bit of tubing that'll fit tight over the end of the core, push it on and unscrew


Top
 Profile  
 
PostPosted: Fri Mar 29, 2013 12:11 pm 
Offline

Joined: Fri Mar 16, 2012 1:49 pm
Posts: 136
Location: LA/OC, California
If it's only lightly closed, you could just flip your valve extender upside down, push down firmly against the valve core and try to turn it open. Happened to me a few times and I just ended up doing that.

_________________
Bike: Felt FC

Strava


Top
 Profile  
 
PostPosted: Fri Mar 29, 2013 3:50 pm 
Offline

Joined: Sat Dec 13, 2003 2:25 am
Posts: 4311
Location: Canada
That is exactly the reason we don't use them. While the 'right' answer is to remove the tire and re-do it with a 'proper' extender, the smart thing to do is to try to open the valve.

Try to unthread the valve extender. If you can't do it easily, don't force it, you could damage the interface between the valve and tube. I did this for a neighbor before (Tri-geek) with a small wooden dowel with a little tubular glue on it. It worked. Fortunately (unfortunately) he promptly rode through a whole pile of broken glass in the alley behind his house and cut his race tires to ribbons (doctors)! He learned not to ask the LBS to do that work...


Top
 Profile  
 
PostPosted: Sat Mar 30, 2013 8:03 pm 
Offline

Joined: Fri Feb 01, 2013 12:26 pm
Posts: 23
topeak valve extenders have an internal "tube" designed for exactly this situation. They open and close the valve screw even when the extender is fitted. However, you can usually achieve the same with a thin but rigid plastic tube, like you get with spray lubes etc. You just need to open up or widen the end a bit to fit tightly over the valve screw.


Top
 Profile  
 
PostPosted: Sun Mar 31, 2013 12:23 am 
Offline
Shop Owner

Joined: Sat Jun 13, 2009 4:02 am
Posts: 1951
Location: NoVA/DC
Mavic has extenders that are specifically designed to be flipped around to screw/unscrew the presta valve. it grips them just right.
Next time, though, you should "jam" the valve open by unscrewing the valve nut a little further than you normally can by hand (ie turn w pliers 1/8 of a turn more).


Top
 Profile  
 
Posted: Sun Mar 31, 2013 12:23 am 


Top
  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 


Who is online

Users browsing this forum: addictR1, adson, amey, breezerboy, Google Adsense [Bot], IamnotWiggins, manninen, Miller, rmerka, spud and 82 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Valve extenders vs long valve stems

in Road

G6612

8

674

Fri May 24, 2013 5:13 pm

FIJIGabe View the latest post

There are no new unread posts for this topic. How to remove center lock on steering ? Giant Trinity

in Road

svrasmussen

4

483

Fri Aug 30, 2013 3:11 am

yourdaguy View the latest post

There are no new unread posts for this topic. WW tube with black valve stem?

in Road

Bianchi10

13

1083

Sat May 04, 2013 2:58 am

kdgrills View the latest post


It is currently Thu Apr 17, 2014 9:38 pm

All times are UTC + 1 hour




Advertising   –  FAQ   –  Contact   –  Convert   –  About

© Weight Weenies 2000-2013
hosted by starbike.com


How to get rid of these ads? Just register!


Powered by phpBB