Presta valves

Discussion in 'Australia and New Zealand' started by Ben, Jan 20, 2005.

  1. Ben

    Ben Guest

    I had my first flat tyre on my bike, and I have the skinny valves, presta ?
    Are these valves a pain or what, I had so much trouble to inflate the tyre,
    the valve kept pushing in, then when I held it, air would not go in, and yes
    I loosened the valve like your supposed to.

    So is it me, or are these little buggers a pain in the backside ?
     
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  2. hippy

    hippy Guest

    "Ben" <[email protected]
    >I had my first flat tyre on my bike, and I have the skinny valves, presta ?
    > Are these valves a pain or what, I had so much trouble to inflate the
    > tyre,
    > the valve kept pushing in, then when I held it, air would not go in, and
    > yes
    > I loosened the valve like your supposed to.
    >
    > So is it me, or are these little buggers a pain in the backside ?


    Sorry dude.. it's you. :)

    What sort of pump? Push the pump on and grip around
    the tyre, pushing the pump onto the valve. A good pump
    should grip the valve. You might have valves that are too
    short for your rims.

    hippy
     
  3. Ray Peace

    Ray Peace Guest

    Ben wrote:

    >I had my first flat tyre on my bike, and I have the skinny valves, presta ?
    >Are these valves a pain or what, I had so much trouble to inflate the tyre,
    >the valve kept pushing in, then when I held it, air would not go in, and yes
    >I loosened the valve like your supposed to.
    >
    >So is it me, or are these little buggers a pain in the backside ?
    >
    >
    >
    >

    Greetings,
    I have been using Prestas for years, wouldn't be
    without them. They can be a pain at times, but then so can any bike
    valve. Remember the old ones with the little sliding piece inside the
    metal casing? They were more fun.
    Regards,
    Ray.
     
  4. kim

    kim Guest

    hippy wrote:
    > "Ben" wrote:
    >>I had my first flat tyre on my bike, and I have the skinny valves, presta ?
    >>Are these valves a pain or what, I had so much trouble to inflate the
    >>tyre, the valve kept pushing in, then when I held it, air would not go in, and
    >>yes I loosened the valve like your supposed to.
    >>
    >>So is it me, or are these little buggers a pain in the backside ?

    8<
    > What sort of pump? Push the pump on and grip around
    > the tyre, pushing the pump onto the valve. A good pump
    > should grip the valve. You might have valves that are too
    > short for your rims.


    i have recently moved to these valves on my 'new' bike.

    i must say they get a bit of geting used to.
    it does depend on the pump as to how well they work.
    my first leight weight pump did not grip the valve stem very well
    air leaked and i hardly got more than 5-psi in the tyre,
    but i lashed out and purchased a "wrench force mini road"
    a couple of weeks ago. so changing that rear tyre with
    the hooooj bulge was a breeze ;) now puching ~85 psi

    its one of those 'good tools/bad tools' things, IMHO ;)

    cheers,

    kim
     
  5. Marx SS

    Marx SS New Member

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    Car valves (Hauser?) are handy. Some reckon that they can't hold pressures over 90psi well, I dunno, I ride MTBs.
    My whizz-bang Specialised Stumpjumper has those wierd 18 spoked Schimano wheels which means that I gotta have presta valves (due to the narrow/tall rims), so pumping them means I gotta remember to unscrew the top of the valve-thing & tap it once to 'un-seat' it ready for a pump (if it was part of the HSC I would have failed it).

    I wonder what's so shit about car valves, apart from that they're also used for cars?
     
  6. hippy

    hippy Guest

    "Marx SS" <[email protected]
    > Car valves (Hauser?) are handy.


    Schrader?

    > Some reckon that they can't hold pressures over 90psi well, I dunno, I
    > ride MTBs.


    They do. I used the 'car' valves on my mtb with S-Licks >90psi.

    > I wonder what's so shit about car valves, apart from that they're also
    > used for cars?


    http://www.geocities.com/cyqlist/valve.html

    hippy
     
  7. Kim Hawtin

    Kim Hawtin Guest

    hippy wrote:
    > "Marx SS" wrote:
    >>Some reckon that they can't hold pressures over 90psi well, I dunno, I
    >>ride MTBs.

    >
    > They do. I used the 'car' valves on my mtb with S-Licks >90psi.


    i recon the issue is "reliably" hold pressure over 60psi,
    which seems to be the common upper limit of 'air compressor'
    gadgets at servos

    i have found that a lot of valves on cars do not hold over 40psi
    reliably, so if your bicycle valves hold 90psi, you're on a winner ;)

    >>I wonder what's so shit about car valves, apart from that they're also
    >>used for cars?


    they've been manufacutred *cheaply* in large quantities, so quality suffers.

    cheers,

    kim
     
  8. hippy

    hippy Guest

    "Kim Hawtin" <[email protected]> wrote in message
    news:[email protected]
    > hippy wrote:
    > > "Marx SS" wrote:
    > >>Some reckon that they can't hold pressures over 90psi well, I dunno, I
    > >>ride MTBs.

    > >
    > > They do. I used the 'car' valves on my mtb with S-Licks >90psi.

    >
    > i recon the issue is "reliably" hold pressure over 60psi,
    > which seems to be the common upper limit of 'air compressor'
    > gadgets at servos
    >
    > i have found that a lot of valves on cars do not hold over 40psi
    > reliably, so if your bicycle valves hold 90psi, you're on a winner ;)
    >
    > >>I wonder what's so shit about car valves, apart from that they're also
    > >>used for cars?

    >
    > they've been manufacutred *cheaply* in large quantities, so quality

    suffers.

    I think that's more a limit of the pump equipment, not the valves.

    I think this has been mentioned before, but Schrader valves are
    used on suspension forks which hold 200+ psi. There should be
    no problem with 90psi, other than the crappy service station
    pumps failing to get that high - which happens a LOT.

    hippy
     
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