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  1. #1
    Stiff yet compliant
    Reputation: vkalia's Avatar
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    Feb 2009
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    Mountain Morph problem

    So after all the great reviews the Topeak Mountain Morph has gotten, I decided to get one. Now, all my bikes have Presta valves.

    When I reverse the insert in the chuck and try to use this pump, I start having a problem. The cavity of the chuck (which goes over and fixes onto the presta valve of the tube) seems to not be deep enough, and as a result, attaching the chuck to the valve means that air starts hissing out pretty much all the time - and quite rapidly, too.

    This pretty much makes the pump useless.

    Looking at the design, it doesnt appear to be defective or flawed. So am I defective/flawed and missing some pretty obvious step, or is anyone else also having this problem with filling prestas?

    I like the idea of having a tube to attach to the tire, instead of the pump directly, and otherwise, I am very pleased with this pump. Anyone know if the Turbo Morph G also has this problem?

    TIA,
    V.
    EMD9, drop-bar Bandersnatch, Surly LHT, a couple of Ridleys
    ... and a lot more bruises than can be counted

  2. #2
    Probably drunk right now
    Reputation: Ken in KC's Avatar
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    Jan 2004
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    Quote Originally Posted by vkalia
    So after all the great reviews the Topeak Mountain Morph has gotten, I decided to get one. Now, all my bikes have Presta valves.

    When I reverse the insert in the chuck and try to use this pump, I start having a problem. The cavity of the chuck (which goes over and fixes onto the presta valve of the tube) seems to not be deep enough, and as a result, attaching the chuck to the valve means that air starts hissing out pretty much all the time - and quite rapidly, too.

    This pretty much makes the pump useless.

    Looking at the design, it doesnt appear to be defective or flawed. So am I defective/flawed and missing some pretty obvious step, or is anyone else also having this problem with filling prestas?

    I like the idea of having a tube to attach to the tire, instead of the pump directly, and otherwise, I am very pleased with this pump. Anyone know if the Turbo Morph G also has this problem?

    TIA,
    V.

    Mmost mini pumps have two inserts that require changing to switch between presta and schraeder valves.

    1. The rubber seal.
    2. A plastic insert underneath the rubber seal that has an open hole on one side (presta)and a plastic knob in the center of the insert to depress the schraeder valve on the other side.

  3. #3
    Stiff yet compliant
    Reputation: vkalia's Avatar
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    Feb 2009
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    266
    Doh, you are correct. So the defect/flaw was with me.

    In my defense, in my other 2 pumps, there is only one bit that needs to be flipped, not 2 (just checked - apparently, the insert and seal are combined into one part).

    Thanks for the help, Ken!
    EMD9, drop-bar Bandersnatch, Surly LHT, a couple of Ridleys
    ... and a lot more bruises than can be counted

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