leaving presta valve adapters on valve stem.
08-05-08, 05:38 PM
#1
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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.
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.
08-05-08, 06:08 PM
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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.
08-05-08, 06:22 PM
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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?
08-05-08, 06:50 PM
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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.
08-06-08, 06:56 AM
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aka: Mike J.
08-06-08, 07:12 AM
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Screw the nut back in would be my advice.
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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.
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08-06-08, 08:58 AM
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08-06-08, 09:01 AM
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aka: Mike J.
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.
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.
08-06-08, 09:47 AM
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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.
i'm gonna screw the nut back in to avoid road gunk from getting in the valve.
08-06-08, 11:11 AM
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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??
