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  1. #1
    on your left.
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    leaving presta valve adapters on valve stem.

    searched, but i can't find the exact answer to my question.

    my lbs convinced me to leave my valve adapters on my valve stems, which is great. my question, though, is: Can i leave the presta valve unscrewed (as it is when you're filling it) and the adapter over it, or do i have to rescrew the presta valve everytime i put the adapter on to leave it?

    thanks, and if that was too confusing i'll clear it up.
    Quote Originally Posted by caloso View Post
    I learned this the hard way. They say that experience is the best teacher, but I would have been preferred to just read about it on the internet.

  2. #2
    cab horn
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    You can leave it unscrewed, the adapter neatly covers the top so that the nut cannot be depressed with the adapter in place. At any rate, the adapter adds rotational weight to your wheels at the worst spot.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  3. #3
    on your left.
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    I'd think the tube would fail somewhere else or some other way before the stress of the additional rotational weight would cause it to puncture it at the stem, right?
    Quote Originally Posted by caloso View Post
    I learned this the hard way. They say that experience is the best teacher, but I would have been preferred to just read about it on the internet.

  4. #4
    Old Fogy
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    Please leave them on. I collect them from the trails and roadsides after they fall off!

  5. #5
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    The rotational weight won't cause your tubes or rims to fail. It will just adversely effect acceleration and possibly unbalance the wheel at high speed. But in all honesty, and I mean this in the least offensive way possible, if you are the type of rider who uses valve adapters, you probably won't notice the effects of said adapters; I even doubt most pros or serious amateurs would notice that much. So if you find them convenient go ahead and leave them on... they can't weigh more than 5g anyways.

  6. #6
    working on progress treebound's Avatar
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    Quote Originally Posted by waldowales View Post
    Please leave them on. I collect them from the trails and roadsides after they fall off!


    This is along the lines of "don't ziptie your SuperFlash blinkies"

  7. #7
    Senior Member 04jtb's Avatar
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    Screw the nut back in would be my advice.
    Quote Originally Posted by cc700 View Post
    i jam my thumbs up and back into the tubes. this way i can point my fingers straight out in front to split the wind and attain an even more aero profile, and the usual fixed gear - zen - connectedness feeling through the drivetrain is multiplied ten fold because my thumbs become one with the tubing.
    A group for all Dawes Galaxy owners to give and recieve information about them
    http://flickr.com/groups/dawes_galaxy/

  8. #8
    Senior Member anti.team's Avatar
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    Quote Originally Posted by 04jtb View Post
    Screw the nut back in would be my advice.
    I agree. The adapter might cover it so you can't press it in, but a pebble or other piece of road debris could.
    Quote Originally Posted by crushkilldstroy View Post
    99% of the world already thinks you're a moron for riding a bike anyways so it doesn't really matter what shoes you're wearing.

  9. #9
    working on progress treebound's Avatar
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    Then put a valve cap on it too.
    The LBS I'm at has a little jar with free valve caps for people to take if they need/want one, it's an assortment of both Presta and Schrader valve caps. Some customers like the brightly colored ones whenever they see one in there and will exchange a black one for a red one.

  10. #10
    on your left.
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    thanks for the advice! @treebound: zipties and superflash blinkies were made for each other
    i'm gonna screw the nut back in to avoid road gunk from getting in the valve.
    Quote Originally Posted by caloso View Post
    I learned this the hard way. They say that experience is the best teacher, but I would have been preferred to just read about it on the internet.

  11. #11
    Senior Member datlas's Avatar
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    Maybe I don't get it, but why would you use these adaptors anyway? Don't you use a presta pump??

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