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  1. #1
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    New question here. Quad Caliper Mounting Bracket

    Could someone tell me what this does?



    Quote Originally Posted by Quad Website
    QAB-120
    CALIPER MOUNTING BRACKET FOR 120/140 ROTOR, FIXED ANGLE, FOR HORIZONTAL DROP-OUT WITH 9MM HUB, BLISTER PACKED

  2. #2
    NWS
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    Looks like it's for putting disc calipers onto frames that were made for rim brakes.

    Axle goes into the notch on the lower right, the nut at the top right snugs down to the frame, and the thumbscrew on the left would be adjusted to contact the seatstay, so the thing doesn't rotate forward when you hit the brakes.

  3. #3
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    Caliper Mounting Bracket For 120/140 Rotor, Fixed Angle, For Horizontal Drop-out With 9mm Hub, Blister Packed

  4. #4
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    Quote Originally Posted by NWS
    Looks like it's for putting disc calipers onto frames that were made for rim brakes.

    Axle goes into the notch on the lower right, the nut at the top right snugs down to the frame, and the thumbscrew on the left would be adjusted to contact the seatstay, so the thing doesn't rotate forward when you hit the brakes.
    Thanks NWS!

    Could someone confirm this?
    I want to have disc brakes mounted on my bike, but it does not have the mounting points on the dropouts. This seems like a better option compared to the Bike Therapy one. Are there any other options available out there? And is Quad the only manufacturer for this kind of component?

  5. #5
    Nouveau Retrogrouch SuperModerator
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    Quote Originally Posted by Ian Crasta
    Thanks NWS!

    Could someone confirm this?
    I want to have disc brakes mounted on my bike, but it does not have the mounting points on the dropouts. This seems like a better option compared to the Bike Therapy one. Are there any other options available out there? And is Quad the only manufacturer for this kind of component?
    Will work only if you have track tips/singlespeed horizontal dropouts.

    I could not get their site to load to find details.
    I have never seen a 120mm mtb brake rotor and there are no 9mm rear axles.
    mtbtires.com
    The trouble with common sense is it is no longer common

  6. #6
    NWS
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    What's the diameter of quick-release (skewer) axles?

  7. #7
    Nouveau Retrogrouch SuperModerator
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    Quote Originally Posted by NWS
    What's the diameter of quick-release (skewer) axles?
    The axle end diameter is 9mm front, 10mm rear.
    mtbtires.com
    The trouble with common sense is it is no longer common

  8. #8
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    Quote Originally Posted by shiggy
    Will work only if you have track tips/singlespeed horizontal dropouts.

    I could not get their site to load to find details.
    I have never seen a 120mm mtb brake rotor and there are no 9mm rear axles.
    Will post pictures of what I got.

  9. #9
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    Looks like it is made for BMX frames that use a 3/8" axle. There may be a 120mm rotor made for BMX.

    Warning: many bmx parts are made specifically for very lightweight riders and have weight restrictions.

    And like Shiggy said it will only work if you have horizontal dropouts, those nubs on either side of where the axle goes have to fit in the dropout to lock it in place.

  10. #10
    rebmem rbtm
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    There's also have a 140/160 variable angle version.........



    ...........but it too looks like it's made for BMX with horizontal dropouts.

    BMX Disc Kits: http://quad.wcy.com.tw/product_7.html

    120mm Rotor: http://quad.wcy.com.tw/product_4.html

    Adapters: http://www.quadbrakes.com/am_pro/am_backtes.html

    From a online seller:

    »Calliper mounting bracket for horizontal drop-out without disc tabs.
    »This mount is solely for use with cup and cone hubs, and is designed to suit frames which do not have disc mounts on the drop-out
    »A Front 180 bracket (QAB02) is required to use a 160mm rear rotor on Quad systems.
    »Supplied with chain tensioner.
    »Suits 140mm size rotors.

    Couple of photos on a BMX: http://bmxmuseum.com/forums/viewtopic.php?pid=580994




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