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  1. #1
    Senior Member Bill Kapaun's Avatar
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    Will these cranks work

    In my search for shorter cranks, (bad knee) I ran across these "BMX" cranks.

    http://www.blueskycycling.com/view_p...eProductSearch

    Is there any reason they wouldn't work on my 110/74 triple on my 86 RockHopper? Both are SQ. taper.
    Any caveats?

  2. #2
    Svr
    Svr is offline
    Senior Member Svr's Avatar
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    I don't think those cranks have the mounting holes for a 74mm granny ring, and you might need a different length spindle. Otherwise they should work fine.

  3. #3
    Pwnerer Wordbiker's Avatar
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    Quote Originally Posted by Svr View Post
    I don't think those cranks have the mounting holes for a 74mm granny ring, and you might need a different length spindle. Otherwise they should work fine.
    This would fix the granny ring issue.
    Quote Originally Posted by ahsposo View Post
    Ski, bike and wish I was gay.

  4. #4
    Your mom
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    TA makes cranks in multiple lengths, I think.

  5. #5
    Your mom
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    But they're $300!

  6. #6
    Senior Member Bill Kapaun's Avatar
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    Quote Originally Posted by Svr View Post
    I don't think those cranks have the mounting holes for a 74mm granny ring, and you might need a different length spindle. Otherwise they should work fine.
    My granny already mounts to the middle ring, so I guess I already have a "Triple-lizer of sorts.
    I don't use the granny (flat land riding), but I prefer to keep it just in case.

    I kind of "half expect" that I might need a different spindle length.
    Are BMX spindle lengths much different than MB spindles? I'm currently using a 122? MM cartridge.
    I realize that different cranks can vary from manf. to manf. to some degree. I'm just wondering if I should expect to need some non standard (or expensive) length, or if finding the right size shouldn't be a problem.
    I can "fudge" the chain line a bit toward the 2 larger rings.

    Thanks for the replies!

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