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  1. #1
    Senior Member
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    Joe Blow Sport and the Presta valve

    Hrm. So Iīm gonna go ahead and ask a question that will probably forever put a big neon idiot sign on my forehead..
    But one who doesnīt ask... =)
    So I had the Joe Blow Sport floor pump with the twin head a few years but never used the presta side as I basically never had to.
    Now I recently switched to a presta valve and finding myself in a pretty amusing situation.
    I donīt know how to pump my tyres.
    As I said I never used the presta side and obviously it doesnt work like with a schrader as no air flows in the tube....
    So anyone has the same pump or can help me out with a tip?
    I searched the topeak website but couldnt really find anything helpful.
    The Twinhead download "manual" didnt really do the trick either.
    So laughters and taunts are on me.
    But... help?

  2. #2
    ROAD enthusiast revolator's Avatar
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    step 1. Take cap off and loosen air valve on tire stem (allows air to be pumped in)
    step 2. Put presta pump head over stem (loosened)
    step 3. flick the head lock to the opposite direction of the stem (for air seal)
    step 4. pump to desired pressure
    step 5. release head lock and take head off tire stem
    step 6. tighten air valve on stem and place cap back on.

  3. #3
    Small Member maddmaxx's Avatar
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    Nov 2003
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    One addition to the above. After you loosen the lock nut on the valve stem, give it a quick tap as presta's tend to become sticky.

    Air will go into the tube when the pressure in the pump exceeds the pressure in the tube, not before. Sometimes if the valve is a little sticky, pressure in the pump will get very high before the valve releases.

  4. #4
    Senior Member
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    Thanks!

  5. #5
    Senior Member Deanster04's Avatar
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    Dec 2005
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    Boulder, Colorado
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    Cinelli Supercoursa 69, Ritchey Breakaway Cross, Mondonico Diamond Extra 05, Coors Light Greg Lemond (built by Scapin) 88, Scapin MTB, Stumpjumper 83, Specialized Stumpjumper M4, Lemond Poprad 2001
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    Make sure that your have the little handle moved in the right direction...

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