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  1. #1
    horn doggie
    Reputation: scooderdude's Avatar
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    Looking for source to fork/brake mount specs

    Does anyone have a source or link to the technical specifications for a rigid fork, particularly "standards" for cantilever and cam brake brake boss locations relative to the axle or some other landmark, and distance apart?
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  2. #2
    Bike Dork
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    26" (559) 255 mm from the axle to boss and width 75-85 mm for canti-bosses.
    I don't know the U-brake boss distances.

  3. #3
    horn doggie
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    Quote Originally Posted by themanmonkey
    26" (559) 255 mm from the axle to boss and width 75-85 mm for canti-bosses.
    I don't know the U-brake boss distances.
    Thanks for that. Will you please direct me to the source for that info? Am looking for the technical "manual" that specifies these different configurations. Let's say I'm a newbie frame builder and I'm stocking my reference library. Someone told me Shimano actually published this info, but I can't find it after searching for days.
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  4. #4
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    There was just a thread not too long ago with roller-cam specs - would be the same for u-brakes. Roller cam brake help

    Here is some info for canti brakes.








  5. #5
    horn doggie
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    SSMike - Dude! Exactly what I was looking for. Right on. Thanks!

    Any luck finding the end of the rainbow on my other search?
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  6. #6
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    Quote Originally Posted by scooderdude
    Thanks for that. Will you please direct me to the source for that info? Am looking for the technical "manual" that specifies these different configurations. Let's say I'm a newbie frame builder and I'm stocking my reference library. Someone told me Shimano actually published this info, but I can't find it after searching for days.
    Those manuals were distributed to manufacturers and frame builders.

  7. #7
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    Quote Originally Posted by scooderdude
    SSMike - Dude! Exactly what I was looking for. Right on. Thanks!

    Any luck finding the end of the rainbow on my other search?
    I'll check my old Shimano books today - doubtful, though on the u-brake specs. I bet if you hit up a frame builder who's been building since the dawn of the u-brake, they might have an old Shimano spec book.

  8. #8
    Neo-Retro Forever
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    I have listed the roller cam specs in another thread and referenced the source directly.

  9. #9
    horn doggie
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    Quote Originally Posted by richieb
    I have listed the roller cam specs in another thread and referenced the source directly.
    Yep, I scoured it. Thanks! This is precisely the info I needed.
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  10. #10
    gobsmacked Moderator
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    Quote Originally Posted by scooderdude
    Yep, I scoured it. Thanks! This is precisely the info I needed.
    Dying to know what you're up to, S.

  11. #11
    horn doggie
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    Quote Originally Posted by sfgirlonbike
    Dying to know what you're up to, S.
    This, and I need front brakes! I plan to race DH on this at Toro starting next weekend.
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  12. #12
    mtbr member
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    There's probably a thread with this info at frameforum.net...I remember reading one months ago
    Needed: 26.8mm XTR seatpost, blue GT/Grundig Jersey.

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