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  1. #1
    leftyman
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    4 Bolt verses 6 bolt holes for mounting disk breaks

    Are 6 Bolt hole mounts better than 4 bolt holes mounts for mounting disk breaks on a Mountain bike?

  2. #2
    Gone, but not forgotten Sheldon Brown's Avatar
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    6 bolts are the international standard, shouldn't deviate without good reason.

    The only good reason I know of is if you're using a Rohloff Speedhub. Due to the design of the hub, the bolts need to be at a larger radius...however, since they are at a larger radius, 4 bolts is sufficient, especially since Rohloff uses larger than normal bolts.

    Sheldon "666" Brown
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  3. #3
    Senior member Dan Burkhart's Avatar
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    Quote Originally Posted by Sheldon Brown
    6 bolts are the international standard, shouldn't deviate without good reason.

    The only good reason I know of is if you're using a Rohloff Speedhub. Due to the design of the hub, the bolts need to be at a larger radius...however, since they are at a larger radius, 4 bolts is sufficient, especially since Rohloff uses larger than normal bolts.

    Sheldon "666" Brown
    Code:
    +----------------------------------------------+
    |      Certainly the game is rigged.           |
    |        Don't let that stop you;              |
    |     if you don't bet, you can't win.         |
    |                   --Robert A. Heinlein       |
    +----------------------------------------------+

    Cannondale, with their extensive product testing procedures, has determined that 4 bolt rotors are adequate, at least for xc riding. I have a 6 year old one with the 4 bolt expert discs, and have had no issues with it. I retrofitted a Rohloff a year ago, so I still have 4 bolt all around.
    Dan Burkhart

  4. #4
    leftyman
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    Sheldon,
    its a Cannondale LEFTY hub. Hub is in great shape, I don't see any marks on it and has a flat black finish. It is a 32 hole hub with a 4-bolt CODA disc bolt pattern. Comes with bearings. they also have a 24 hole four bolt. Are there any special things to consider if I buildeing a wheel for a lefty? I was inspired by you article to try and build one.

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