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  1. #1
    Meatbomb
    Reputation: Phillbo's Avatar
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    Stans is plugging up my Presta valve stems..

    Any one else have this issue and how do you combat it? I can barely get air in or out of the tires they are so plugged up.

    May have to convert to Schrader valves. If so, how can I tell if my rims will be compatible?

  2. #2
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    Quote Originally Posted by Phillbo View Post
    Any one else have this issue and how do you combat it? I can barely get air in or out of the tires they are so plugged up.

    May have to convert to Schrader valves. If so, how can I tell if my rims will be compatible?
    Are you using stan's removable mountain valve stems or just the sealant? They're pretty easy to clean by taking them apart. And also to inflate the tire. That is, I'll remove the core and fill the tire up to get the bead to set and then let the air out, replace the core and it's much easier to fill even if the valve stem is a bit clogged.
    "The world is worse when you are behind a keyboard. The world is best when you are behind handlebars." M77Ranger.

  3. #3
    Go Speed Racer
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    Just curious, do you have the stans valve stems with removable cores? It is super easy to just remove the core and wipe off the dried up gunk, then put it back in good as new... No need to go drilling holes in your rims...

    Edit: LOL Rockman beat me to it

  4. #4
    Go Speed Racer
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    Quote Originally Posted by rockman View Post
    Are you using stan's removable mountain valve stems or just the sealant? They're pretty easy to clean by taking them apart. And also to inflate the tire. That is, I'll remove the core and fill the tire up to get the bead to set and then let the air out, replace the core and it's much easier to fill even if the valve stem is a bit clogged.
    Yeah, I have even found that I can get the core back in before the tire deflates all the way. I can have it back in and still have around 18-20psi in the tire. Makes it super easy to pop the bead on the rim without the core in the stem...

  5. #5
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    949 Schrader valves.
    Trust me you'll love them.

    I was using Stan's prestas on my 29er and it was a constant PITA for me. Once I converted it, it has been as trouble free as my other bike that has had the 949 for years.
    I think I'm not as good as I thought.

  6. #6
    Ahhh the pain....
    Reputation: Raybum's Avatar
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    I've had two types of issues with Stans and the Presta Cores. One is where the plunger seal(?) on the removable core gets crap in between it and the brass surface. That will cause a slow air leak. The other is where the stem, very near where is goes through the rim gets clogged. That will make filling a *****. FOr the later, I just removed the core and poke something down into the core to clear the clog. I've also found my stans injector to get clogged too.
    Your limits are both physical and mental. Suffering will help you find and overcome both.
    http://onegear-ray.blogspot.com/

  7. #7
    Meatbomb
    Reputation: Phillbo's Avatar
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    No clue what type of stems are on it right now. Is there a marking I can look for to tell me? Or just grab the core with a pair of pliers and see if it comes out



    on edit: I just stepped out and looked. Mine have no markings what so ever. Look like I need to swap them out for the removable type.

  8. #8
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    this tool
    Amazon.com: No Tubes PRESTA/SCHRADER Valve Core Remover: Sports & Outdoors

    is how you remove the cores... (if you don't already know this )
    Below Par on the Gnar

  9. #9
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    Those look pretty awesome. Can they be removed on the trail, in case of tubeless fail?

    Sent from my SCH-I545 using Tapatalk now Free

  10. #10
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    Quote Originally Posted by papatini View Post
    Those look pretty awesome. Can they be removed on the trail, in case of tubeless fail?

    Sent from my SCH-I545 using Tapatalk now Free
    not sure if this was addressed to me... but if it was... yes you can remove the core on the trail and you can keep a small amount of stans in your pack to refill...
    Below Par on the Gnar

  11. #11
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    Sorry. My question is for the 949 valves.

    Sent from my SCH-I545 using Tapatalk now Free

  12. #12
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    Re: Stans is plugging up my Presta valve stems..

    Philbo,
    see how the top set of threads are flattened? That should let you know that the cores are removable. It for gripping them with a pliers to unscrew them w/o messing up the rest of the threads
    Attached Thumbnails Attached Thumbnails Stans is plugging up my Presta valve stems..-1381868999606.jpg  

    I think I'm not as good as I thought.

  13. #13
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    Quote Originally Posted by papatini View Post
    Those look pretty awesome. Can they be removed on the trail, in case of tubeless fail?

    Sent from my SCH-I545 using Tapatalk now Free
    Yes, just unscrew the nut, and they pop right off. There is a big thread somewhere here in the AZ forum that talks more about them.
    I think I'm not as good as I thought.

  14. #14
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    Quote Originally Posted by Phillbo View Post
    Any one else have this issue and how do you combat it? I can barely get air in or out of the tires they are so plugged up.

    May have to convert to Schrader valves. If so, how can I tell if my rims will be compatible?
    This is why dog invented singlespeeds.
    Rarely adds anything productive to threads

  15. #15
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    FWIW, I always grease all the threads and stem before putting Stan's in. Works for me.

  16. #16
    Ahhh the pain....
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    Quote Originally Posted by Casual Observer View Post
    This is why dog invented singlespeeds.
    Seriously? C'mon.
    Your limits are both physical and mental. Suffering will help you find and overcome both.
    http://onegear-ray.blogspot.com/

  17. #17
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    Quote Originally Posted by Raybum View Post
    Seriously? C'mon.
    ^^^Newbie
    Rarely adds anything productive to threads

  18. #18
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    Stans valves have removable cores. New valve cores should be around 3 bucks.

  19. #19
    Black and Sticky
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    Quote Originally Posted by MtbAZ44 View Post
    this tool
    Amazon.com: No Tubes PRESTA/SCHRADER Valve Core Remover: Sports & Outdoors

    is how you remove the cores... (if you don't already know this )
    Exactly this using removable cores. Tool isn't 100% necessary, but really makes things easy.

    Bob
    "Some people follow their dreams, others hunt them down and beat them mercilessly into submission." - Neil Kendall

  20. #20
    Meatbomb
    Reputation: Phillbo's Avatar
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    Guess i'll need to swap out valves
    Last edited by Phillbo; 10-16-2013 at 12:04 PM.

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