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Thread: Noob Question

  1. #1
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    Noob Question

    Maybe a bit of an idiot question, but how important is it to use a brand's bracket with the brake? This is, of course assuming the brake and adapter are International Standard.

    For example using a Hayes mounting bracket with an Avid Calliper

    I feel like its a bit of a silly question, but I wasn't able to find any information about it.

    (The brakes are Funn EZR, I have an Avid Rear Mount)
    '10 Hardrock Sport Disc

  2. #2
    bt
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    always use the brake manufacturers adaptor bracket.

  3. #3
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    Yes the mount hole spacing will be the same across manufacturers.

    The space for your caliper (that's cut out from the adaptor) may or may not be the same for each manufacturer.

    You sound as if you already have the hardware - in that case, if it fits, you're golden.

  4. #4
    rebmem rbtm
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    Quote Originally Posted by bt View Post
    always use the brake manufacturers adaptor bracket.
    It's not always necessary to use the same brands.

    What's necessary is that the adapter size matches the the rotor size.
    eg. use a 180mm adapter with a 180mm rotor but don't use a 185mm adapter with a 180mm rotor.

    It's also necessary that the adapter mounts match up with the frame/fork mounts and the brake caliper mount.

    The PM and IS brake caliper are made to standards as are the PM and IS brake mounts on the frame/fork.

    The standards allows a PM brake caliper to be mounted to a PM brake mount without an adapter when used with a certain size rotor and it allows a IS brake caliper to be mounted to a IS brake mount without an adapter when used with a certain size rotor.

    A brake adapter merely allows you to use different size rotors or to mount a brake caliper on frame/fork with a different mount to what it has.

    Some brake calipers, specifically Avid, need special cup/cone washers (called CPS or Tri Align) which can be seen in this photo, these washers need to be placed between the brake caliper and the frame/fork mount or between the brake caliper and the brake adapter to pack the brake caliper out so it's in the correct place. These CPS/Tri Align washers should only be used with Avid brake calipers, if used with other brands of brake caliper they will pack the brake caliper out too much and you'll have about 5mm of the brake pads overhanging the outer edge of the rotor.

    * Avid makes one type of brake adapter that looks like this, it has the CPS/Tri Align built into it, this adapter should only be used with Avid brake calipers.

    * Some Avid brake adapters like the one on the right in this photo, don't have level surfaces. This doesn't matter when using a Avid brake caliper with the CPS/Tri Align washers but if you use a different brand of brake caliper on it then it won't be seated on the adapter properly. Not all Avid adapters have uneven surfaces, if the adapter has even surfaces you can mount any brand of brake caliper on it when using the appropriate size rotor.

    Quote Originally Posted by madaxc
    the brake and adapter are International Standard.
    Funn makes PM and IS mount brake calipers.
    Quote Originally Posted by madaxc
    The brakes are Funn EZR, I have an Avid Rear Mount
    Avid only makes brake adapters for PM brake calipers
    Avid makes brake adapters for both PM and IS frame/fork mounts.

    If you have a PM brake caliper it will probably work with a Avid adapter.
    If you have a IS brake caliper it won't work with a Avid adapter.


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    Last edited by cobba; 12-12-2012 at 09:26 PM.

  5. #5
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    Thanks to all who answered!
    '10 Hardrock Sport Disc

  6. #6
    Waiting for my Obamabucks
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    Great question by the way!
    2010 Santa Cruz Blur LT2, Fox TALAS Terralogic, Fox RP23 shock, SRAM X0, XTR Trail Brakes, Stans/Chris King Wheelset

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