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  1. #1
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    Caution;  Merge;  Workers Ahead! Trek VRX400 Disc Brake

    I have a friend with a 1999 Trek VRX400 and it has front cable actuated Hayes disc brakes and v-brakes in the rear. The hub on the rear is ready to accept a 6 bolt rotor but the two holes on the non-drive rear stay are so close together that no current Shimano, Avid or Hayes adapter will fit. If he had bought the 500 model that year, it would have had rear disks, so I know it is possible.

    Any thoughts or does anyone have such a beast?
    The reason dogs have so many friends is that they wag their tail instead of their tongues.

  2. #2
    TNC
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    Is that the old Trek 25mm funky proprietary mount they used for awhile? Sure sounds like it. Are the holes facing straight up rather than being horizontal like IS rear mounts? I haven't seen one in quite awhile, so I'm going from memory. I think I recall that Hayes was the only one who made a mount for this design. I doubt they're still available, but one should be floating around somewhere.

  3. #3
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    Yup

    That's the one........I wonder if I call Hayes if they have one in a box somewhere?
    The reason dogs have so many friends is that they wag their tail instead of their tongues.

  4. #4
    rebmem rbtm
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    Quote Originally Posted by TNC
    Is that the old Trek 25mm funky proprietary mount they used for awhile?
    You don't mean a 22mm seat stay brake mount that one of these adapters would fit on: http://www.chainreactioncycles.com/Models.aspx?ModelID=20557

  5. #5
    Nouveau Retrogrouch SuperModerator
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    Quote Originally Posted by cobba
    You don't mean a 22mm seat stay brake mount that one of these adapters would fit on: http://www.chainreactioncycles.com/Models.aspx?ModelID=20557
    You are correct and that adaptor will work.
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  6. #6
    TNC
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    Oh yeah...22mm. In the famous words of Maxwell Smart..."I missed it by that much".

  7. #7
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    FYI-the 22mm mount is not a Trek proprietary mount. Hayes was the one who made that and other companies besides Trek (including Fisher and Klein) built frames with 22mm rear mounts. Schwinn comes immediately to mind

  8. #8
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    But then which disk brake model?

    Quote Originally Posted by shiggy
    You are correct and that adaptor will work.
    Wow - great responses - thanks, but with what Hayes disk brake and where are sources for same?
    The reason dogs have so many friends is that they wag their tail instead of their tongues.

  9. #9
    Nouveau Retrogrouch SuperModerator
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    Quote Originally Posted by steve47co1
    Wow - great responses - thanks, but with what Hayes disk brake and where are sources for same?
    Any rear IS disc brake will work with the adaptor. Does not need to be a Hayes.
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  10. #10
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    Thank you

    Thanks again, Shiggy; great help!
    The reason dogs have so many friends is that they wag their tail instead of their tongues.

  11. #11
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    Trek VRX rear swing arm search

    I am new to this. I ride a Trek VRX 400 (I know it's a dinosaur) and the local shop recently discovered a small crack in the rear swing arm while servicing my bike. I am searching someone who might have an old VRX frame sitting around or a collection of parts that includes a VRX rear swing arm. If you are this person please let me know and help keep my VRX alive!

  12. #12
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    Vrx lives!!

  13. #13
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    i have the same problem on my trek vrx 200

    Just got the frame and realized about the rear mount found it hard to come accross shame as i have a xtr set to put on her any advice would be apreciated.

    Quote Originally Posted by jranaudo View Post
    Vrx lives!!

  14. #14
    rebmem rbtm
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    You'll need a A2Z AD-PMR adapter.

    A2Z Brake Adapters

    If you have a PM brake caliper you'll also need a PM to IS adapter too.
    AD-PMR adapter + 140mm Rear PM to IS adapter = a 180mm/185mm rotor
    AD-PMR adapter + 160mm Rear PM to IS adapter = a 200mm/205mm rotor

    Shimano 140mm Rear PM to IS adapter
    Shimano 160mm Rear PM to IS adapter
    Universal Cycles -- Shimano Disc Brake Adapters

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