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    • Thread Starter

    Got this new bike and not sure how the wheels work like how they're pumped.

    It's basically one hollow screw that comes out of the wheel and then a second kinda smaller one that has a little bit of rubber on it which slots into the first one.

    I can pump the tyres up fully when it is just the hollow screw but when I the pump of all the air comes out within seconds.

    Anyone heard of this sort of pump or know what Im supposed to do?

    Got this bike off eBay


    do you mean the 'presta valve' in this image?

    if so, at the top of the valve there is a small ring which you screw down as far as you can, then you can attach your pump
    you also need to make sure your pump is compatible with presta valves
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