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  1. #1
    mtbr member
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    Nov 2006
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    upgrade Hayes MX4 to hydro, any gotchas?

    Hi,

    I am contemplating getting a small-frame 24" wheel Kona MTB for my 8 year old son. We live where dirt riding always implies hills, and he can't really pedal uphill on his single speed BMX bike.

    So I found this used Kona, but I learned (from the BMX bike) that his hands weren't quite up to the task of using cable V-brakes on extreme downhills. So I installed a set of Magura hydraulic rim brakes, and he was able to do steep downhills with me.

    Do those junky Hayes MX4 brakes use a 'standard' mount for the caliper? What about the rotors? Will I run into incompatibilities if he needs to switch to hydraulic disc brakes? Which brands have compatible mounts? This bike is probably 4 years old, if that helps.

    Lifespeed

  2. #2
    mtbr member
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    What about the Hayes HFX-9 entry-level hydro? Will it fit? Seems reasonably-priced for a kid's first MTB . . .

    Lifespeed

  3. #3
    mtbr member
    Reputation: jetta_mike's Avatar
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    Feb 2007
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    478
    They mounts should be the same within the Hayes line.

  4. #4
    ride hard take risks
    Reputation: dogonfr's Avatar
    Join Date
    Jan 2005
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    25,589
    Adapters
    Formotion Products
    http://www.formot

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