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Thread: Flat Mount on MTB Frame

  1. #1
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    Default Flat Mount on MTB Frame

    Is flat mount going be the next new 'standard' on mtb frame? What's your take? I'm planning to order a custom 29er hardtail and I want to make sure my new frame has the latest. Personally I like flat mount for its cleaner setup because of caliper location and cable routing. The new bike is going be a replacement of my current XC rig which runs XTR M9000 calipers with 14" rotor F/R. I've been very happy with the braking power from this setup therefore extreme braking power isn't something I'm looking for.
     

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    Default Re: Flat Mount on MTB Frame

    It looks like it is becoming the norm on XC bikes at the rear but not necessarily on trail bikes. I don't think it matters anyway. It is not like postmount calipers will disappear anytime soon.
    --
    T h o m a s

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    Default Re: Flat Mount on MTB Frame

    Nothing is better about flat mount. If it's a proper mountain bike with flat bars, post mount is the way to go.

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    Default Re: Flat Mount on MTB Frame

    It seems like post-mount would almost be required for 180mm rotors?
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    Default Re: Flat Mount on MTB Frame

    The flat mount 180mm standard exists. FM180 or FM160 certainly wouldn't be recommended for an Enduro bike, but if your building an ultra light short travel hard tail with single piston brakes front and rear then it would be an okay option as it does look a bit nicer. Post mount is a bit easier to work with and has a lot more heavy duty caliper options.
    - Brad Comis

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    Default Re: Flat Mount on MTB Frame

    Flat mount relies on two M5 bolts, Post Mount and IS do use two M6 bolts, the tensile strength is a lot higher for the latter, let alone there's very little chance of crossthreading an M6 bolt.
     

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    Default Re: Flat Mount on MTB Frame

    Only my opinion but I don’t like the look of flat mounts. I prefer to build so no adapters are used front or rear and flat mounts on forks generally need the adapter.
     

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    Default Re: Flat Mount on MTB Frame

    the FM is usually far more clean looking than any other, even while using the adapter this is very low profile that you can't compare a 180mm FM to a 180mm PM or IS, unless the latter has a caliper that is native for that size of rotor (like the old Hope ones)
    Andrea "Gattonero" Cattolico, head mechanic @Condor Cycles London


    "Caron, non ti crucciare:
    vuolsi così colà dove si puote
    ciò che si vuole, e più non dimandare"

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